Leetcode

#Leetcode Profile https://leetcode.com/u/RkRoy/

Leetcode Solutions

LeetCode Topics

Tree

0099-recover-binary-search-tree
0101-symmetric-tree
0104-maximum-depth-of-binary-tree
0173-binary-search-tree-iterator
0297-serialize-and-deserialize-binary-tree
0331-verify-preorder-serialization-of-a-binary-tree
0337-house-robber-iii
0449-serialize-and-deserialize-bst
0669-trim-a-binary-search-tree
0893-all-nodes-distance-k-in-binary-tree
0925-construct-binary-tree-from-preorder-and-postorder-traversal
0955-complete-binary-tree-inserter
0988-flip-equivalent-binary-trees
1021-distribute-coins-in-binary-tree
1040-maximum-binary-tree-ii
1093-recover-a-tree-from-preorder-traversal
1218-lowest-common-ancestor-of-deepest-leaves
1248-binary-tree-coloring-game
1387-find-elements-in-a-contaminated-binary-tree
1450-delete-leaves-with-a-given-value
1653-number-of-good-leaf-nodes-pairs
1740-count-subtrees-with-max-distance-between-cities
2104-operations-on-tree
2131-smallest-missing-genetic-value-in-each-subtree
2531-create-components-with-same-value
2545-height-of-binary-tree-after-subtree-removal-queries
2558-minimum-number-of-operations-to-sort-a-binary-tree-by-level
2564-most-profitable-path-in-a-tree
2568-minimum-fuel-cost-to-report-to-the-capital
2646-kth-largest-sum-in-a-binary-tree
2677-cousins-in-binary-tree-ii
3058-maximum-number-of-k-divisible-components
3191-maximum-score-after-applying-operations-on-a-tree
3218-find-number-of-coins-to-place-in-tree-nodes
3307-find-the-maximum-sum-of-node-values
3439-find-minimum-diameter-after-merging-two-trees
3633-maximize-the-number-of-target-nodes-after-connecting-trees-i
3645-maximize-the-number-of-target-nodes-after-connecting-trees-ii
3853-minimum-weighted-subgraph-with-the-required-paths-ii

Depth-First Search

0099-recover-binary-search-tree
0101-symmetric-tree
0104-maximum-depth-of-binary-tree
0297-serialize-and-deserialize-binary-tree
0310-minimum-height-trees
0337-house-robber-iii
0386-lexicographical-numbers
0417-pacific-atlantic-water-flow
0449-serialize-and-deserialize-bst
0565-array-nesting
0669-trim-a-binary-search-tree
0676-implement-magic-dictionary
0684-redundant-connection
0854-making-a-large-island
0893-all-nodes-distance-k-in-binary-tree
0988-flip-equivalent-binary-trees
1021-distribute-coins-in-binary-tree
1093-recover-a-tree-from-preorder-traversal
1218-lowest-common-ancestor-of-deepest-leaves
1248-binary-tree-coloring-game
1350-remove-sub-folders-from-the-filesystem
1387-find-elements-in-a-contaminated-binary-tree
1396-count-servers-that-communicate
1450-delete-leaves-with-a-given-value
1558-course-schedule-iv
1653-number-of-good-leaf-nodes-pairs
2104-operations-on-tree
2131-smallest-missing-genetic-value-in-each-subtree
2201-valid-arrangement-of-pairs
2213-find-all-people-with-secret
2246-maximum-employees-to-be-invited-to-a-meeting
2438-find-closest-node-to-given-two-nodes
2531-create-components-with-same-value
2545-height-of-binary-tree-after-subtree-removal-queries
2564-most-profitable-path-in-a-tree
2568-minimum-fuel-cost-to-report-to-the-capital
2677-cousins-in-binary-tree-ii
2764-maximum-number-of-fish-in-a-grid
2793-count-the-number-of-complete-components
3058-maximum-number-of-k-divisible-components
3191-maximum-score-after-applying-operations-on-a-tree
3218-find-number-of-coins-to-place-in-tree-nodes
3439-find-minimum-diameter-after-merging-two-trees
3633-maximize-the-number-of-target-nodes-after-connecting-trees-i
3645-maximize-the-number-of-target-nodes-after-connecting-trees-ii
3649-minimum-time-to-break-locks-i
3853-minimum-weighted-subgraph-with-the-required-paths-ii

Binary Tree

0099-recover-binary-search-tree
0101-symmetric-tree
0104-maximum-depth-of-binary-tree
0173-binary-search-tree-iterator
0297-serialize-and-deserialize-binary-tree
0331-verify-preorder-serialization-of-a-binary-tree
0337-house-robber-iii
0449-serialize-and-deserialize-bst
0669-trim-a-binary-search-tree
0893-all-nodes-distance-k-in-binary-tree
0925-construct-binary-tree-from-preorder-and-postorder-traversal
0955-complete-binary-tree-inserter
0988-flip-equivalent-binary-trees
1021-distribute-coins-in-binary-tree
1040-maximum-binary-tree-ii
1093-recover-a-tree-from-preorder-traversal
1218-lowest-common-ancestor-of-deepest-leaves
1248-binary-tree-coloring-game
1387-find-elements-in-a-contaminated-binary-tree
1450-delete-leaves-with-a-given-value
1653-number-of-good-leaf-nodes-pairs
2545-height-of-binary-tree-after-subtree-removal-queries
2558-minimum-number-of-operations-to-sort-a-binary-tree-by-level
2646-kth-largest-sum-in-a-binary-tree
2677-cousins-in-binary-tree-ii

Array

0031-next-permutation
0051-n-queens
0073-set-matrix-zeroes
0118-pascals-triangle
0174-dungeon-game
0179-largest-number
0209-minimum-size-subarray-sum
0218-the-skyline-problem
0239-sliding-window-maximum
0284-peeking-iterator
0300-longest-increasing-subsequence
0318-maximum-product-of-word-lengths
0324-wiggle-sort-ii
0327-count-of-range-sum
0368-largest-divisible-subset
0376-wiggle-subsequence
0384-shuffle-an-array
0396-rotate-function
0407-trapping-rain-water-ii
0413-arithmetic-slices
0416-partition-equal-subset-sum
0417-pacific-atlantic-water-flow
0446-arithmetic-slices-ii-subsequence
0453-minimum-moves-to-equal-array-elements
0454-4sum-ii
0462-minimum-moves-to-equal-array-elements-ii
0474-ones-and-zeroes
0480-sliding-window-median
0494-target-sum
0498-diagonal-traverse
0524-longest-word-in-dictionary-through-deleting
0526-beautiful-arrangement
0539-minimum-time-difference
0554-brick-wall
0565-array-nesting
0594-longest-harmonious-subsequence
0638-shopping-offers
0679-24-game
0689-maximum-sum-of-3-non-overlapping-subarrays
0691-stickers-to-spell-word
0698-partition-to-k-equal-sum-subsets
0699-falling-squares
0713-subarray-product-less-than-k
0719-find-k-th-smallest-pair-distance
0729-my-calendar-i
0731-my-calendar-ii
0739-daily-temperatures
0746-prefix-and-suffix-search
0759-set-intersection-size-at-least-two
0769-largest-plus-sign
0779-max-chunks-to-make-sorted-ii
0780-max-chunks-to-make-sorted
0797-rabbits-in-forest
0808-number-of-matching-subsequences
0819-minimum-swaps-to-make-sequences-increasing
0831-largest-sum-of-averages
0835-linked-list-components
0852-friends-of-appropriate-ages
0854-making-a-large-island
0859-design-circular-deque
0860-design-circular-queue
0875-longest-mountain-in-array
0876-hand-of-straights
0878-shifting-letters
0892-shortest-subarray-with-sum-at-least-k
0901-advantage-shuffle
0902-minimum-number-of-refueling-stops
0905-length-of-longest-fibonacci-subsequence
0912-random-pick-with-weight
0925-construct-binary-tree-from-preorder-and-postorder-traversal
0934-bitwise-ors-of-subarrays
0936-rle-iterator
0940-fruit-into-baskets
0945-snakes-and-ladders
0946-smallest-range-ii
0952-word-subsets
0959-3sum-with-multiplicity
0989-largest-component-size-by-common-factor
0991-array-of-doubled-pairs
1000-delete-columns-to-make-sorted-iii
1020-longest-turbulent-subarray
1025-minimum-cost-for-tickets
1028-interval-list-intersections
1032-satisfiability-of-equality-equations
1042-minimum-cost-to-merge-stones
1055-pairs-of-songs-with-total-durations-divisible-by-60
1063-best-sightseeing-pair
1072-next-greater-node-in-linked-list
1095-two-city-scheduling
1096-maximum-sum-of-two-non-overlapping-subarrays
1140-distant-barcodes
1147-flip-columns-for-maximum-number-of-equal-rows
1169-largest-values-from-labels
1219-longest-well-performing-interval
1227-number-of-equivalent-domino-pairs
1234-number-of-paths-with-max-score
1256-rank-transform-of-an-array
1262-online-majority-element-in-subarray
1293-three-consecutive-odds
1311-largest-magic-square
1331-path-with-maximum-gold
1342-queens-that-can-attack-the-king
1350-remove-sub-folders-from-the-filesystem
1352-maximum-profit-in-job-scheduling
1364-tuple-with-same-product
1396-count-servers-that-communicate
1402-count-square-submatrices-with-all-ones
1409-minimum-number-of-flips-to-convert-binary-matrix-to-zero-matrix
1414-shortest-path-in-a-grid-with-obstacles-elimination
1422-divide-array-in-sets-of-k-consecutive-numbers
1436-get-watched-videos-by-your-friends
1445-number-of-sub-arrays-of-size-k-and-average-greater-than-or-equal-to-threshold
1468-check-if-n-and-its-double-exist
1477-product-of-the-last-k-numbers
1478-maximum-number-of-events-that-can-be-attended
1483-rank-teams-by-votes
1485-minimum-cost-to-make-at-least-one-valid-path-in-a-grid
1497-design-a-stack-with-increment-operation
1510-find-lucky-integer-in-an-array
1524-string-matching-in-an-array
1538-maximum-points-you-can-obtain-from-cards
1550-find-the-kth-smallest-sum-of-a-matrix-with-sorted-rows
1562-people-whose-list-of-favorite-companies-is-not-a-subset-of-another-list
1570-final-prices-with-a-special-discount-in-a-shop
1573-find-two-non-overlapping-sub-arrays-each-with-target-sum
1586-longest-subarray-of-1s-after-deleting-one-element
1621-number-of-subsequences-that-satisfy-the-given-sum-condition
1628-count-submatrices-with-all-ones
1631-number-of-sub-arrays-with-odd-sum
1656-count-good-triplets
1679-shortest-subarray-to-be-removed-to-make-array-sorted
1694-make-sum-divisible-by-p
1700-minimum-time-to-make-rope-colorful
1716-maximum-non-negative-product-in-a-matrix
1744-number-of-ways-to-form-a-target-string-given-a-dictionary
1755-defuse-the-bomb
1766-minimum-number-of-removals-to-make-mountain-array
1767-design-front-middle-back-queue
1772-create-sorted-array-through-instructions
1783-ways-to-make-a-fair-array
1798-max-number-of-k-sum-pairs
1813-maximum-erasure-value
1819-construct-the-lexicographically-largest-valid-sequence
1830-count-good-meals
1849-maximum-absolute-sum-of-any-subarray
1851-maximum-number-of-events-that-can-be-attended-ii
1874-form-array-by-concatenating-subarrays-of-another-array
1876-map-of-highest-peak
1878-check-if-array-is-sorted-and-rotated
1886-minimum-limit-of-balls-in-a-bag
1895-minimum-number-of-operations-to-move-all-balls-to-each-box
1917-maximum-average-pass-ratio
1923-sentence-similarity-iii
1927-maximum-ascending-subarray-sum
1930-maximum-number-of-consecutive-values-you-can-make
1940-maximum-xor-for-each-query
1946-minimum-absolute-sum-difference
1966-frequency-of-the-most-frequent-element
1972-rotating-the-box
1993-sum-of-all-subset-xor-totals
1995-finding-pairs-with-a-certain-sum
2048-build-array-from-permutation
2054-the-number-of-the-smallest-unoccupied-chair
2066-add-minimum-number-of-rungs
2078-maximum-compatibility-score-sum
2089-maximum-matrix-sum
2104-operations-on-tree
2107-find-unique-binary-string
2113-find-the-kth-largest-integer-in-the-array
2145-grid-game
2150-kth-smallest-product-of-two-sorted-arrays
2151-the-time-when-the-network-becomes-idle
2160-minimum-operations-to-make-a-uni-value-grid
2164-two-best-non-overlapping-events
2170-count-number-of-maximum-bitwise-or-subsets
2179-most-beautiful-item-for-each-query
2180-maximum-number-of-tasks-you-can-assign
2188-minimized-maximum-of-products-distributed-to-any-store
2204-find-subsequence-of-length-k-with-the-largest-sum
2220-find-all-possible-recipes-from-given-supplies
2228-watering-plants-ii
2229-maximum-fruits-harvested-after-at-most-k-steps
2232-adding-spaces-to-a-string
2237-longest-palindrome-by-concatenating-two-letter-words
2249-count-the-hidden-sequences
2262-solving-questions-with-brainpower
2265-partition-array-according-to-given-pivot
2277-count-equal-and-divisible-pairs-in-an-array
2285-design-bitset
2292-counting-words-with-a-given-prefix
2308-divide-array-into-equal-pairs
2316-count-hills-and-valleys-in-an-array
2320-find-all-k-distant-indices-in-an-array
2343-count-unguarded-cells-in-the-grid
2356-largest-combination-with-bitwise-and-greater-than-zero
2358-number-of-ways-to-split-array
2362-minimum-rounds-to-complete-all-tasks
2374-steps-to-make-array-non-decreasing
2375-minimum-obstacle-removal-to-reach-corner
2387-partition-array-such-that-maximum-difference-is-k
2388-replace-elements-in-an-array
2394-count-subarrays-with-score-less-than-k
2432-number-of-zero-filled-subarrays
2448-count-number-of-bad-pairs
2449-maximum-number-of-robots-within-budget
2465-shifting-letters-ii
2473-max-sum-of-a-pair-with-equal-sum-of-digits
2478-longest-nice-subarray
2479-meeting-rooms-iii
2494-sum-of-prefix-scores-of-strings
2497-maximum-matching-of-players-with-trainers
2498-smallest-subarrays-with-maximum-bitwise-or
2503-longest-subarray-with-maximum-bitwise-and
2513-number-of-pairs-satisfying-inequality
2527-count-subarrays-with-fixed-bounds
2529-range-product-queries-of-powers
2531-create-components-with-same-value
2533-bitwise-xor-of-all-pairings
2545-height-of-binary-tree-after-subtree-removal-queries
2551-apply-operations-to-an-array
2552-maximum-sum-of-distinct-subarrays-with-length-k
2554-minimum-total-distance-traveled
2564-most-profitable-path-in-a-tree
2581-divide-players-into-teams-of-equal-skill
2586-longest-square-streak-in-an-array
2587-design-memory-allocator
2588-maximum-number-of-points-from-grid-queries
2591-frog-jump-ii
2600-maximum-tastiness-of-candy-basket
2601-number-of-great-partitions
2604-minimum-operations-to-make-array-equal-ii
2616-maximal-score-after-applying-k-operations
2626-count-the-number-of-good-subarrays
2640-maximum-number-of-integers-to-choose-from-a-range-i
2665-minimum-time-to-repair-cars
2681-put-marbles-in-bags
2685-first-completely-painted-row-or-column
2689-rearranging-fruits
2691-count-vowel-strings-in-ranges
2692-take-gifts-from-the-richest-pile
2695-find-score-of-an-array-after-marking-all-elements
2699-count-the-number-of-fair-pairs
2707-merge-two-2d-arrays-by-summing-values
2711-minimum-time-to-visit-a-cell-in-a-grid
2716-prime-subtraction-operation
2755-extra-characters-in-a-string
2764-maximum-number-of-fish-in-a-grid
2766-find-the-prefix-common-array-of-two-arrays
2792-neighboring-bitwise-xor
2794-maximum-number-of-moves-in-a-grid
2839-maximum-sum-queries
2845-find-the-value-of-the-partition
2848-special-permutations
2856-count-complete-subarrays-in-an-array
2868-continuous-subarrays
2872-largest-element-in-an-array-after-merge-operations
2888-minimum-index-of-a-valid-split
2891-maximum-beauty-of-an-array-after-applying-operation
2893-visit-array-positions-to-maximize-score
2915-count-of-interesting-subarrays
3000-minimum-absolute-difference-between-elements-with-constraint
3106-length-of-the-longest-subsequence-that-sums-to-target
3142-longest-unequal-adjacent-groups-subsequence-ii
3151-minimum-processing-time
3152-maximum-value-of-an-ordered-triplet-ii
3154-maximum-value-of-an-ordered-triplet-i
3165-find-indices-with-index-and-value-difference-i
3170-find-indices-with-index-and-value-difference-ii
3171-minimum-equal-sum-of-two-arrays-after-replacing-zeros
3181-find-building-where-alice-and-bob-can-meet
3194-find-words-containing-character
3213-count-subarrays-where-max-element-appears-at-least-k-times
3219-make-lexicographically-smallest-array-by-swapping-elements
3227-find-missing-and-repeated-values
3241-divide-array-into-arrays-with-max-difference
3251-maximum-area-of-longest-diagonal-rectangle
3291-find-if-array-can-be-sorted
3307-find-the-maximum-sum-of-node-values
3321-type-of-triangle
3329-find-the-length-of-the-longest-common-prefix
3332-minimum-operations-to-exceed-threshold-value-ii
3348-minimum-cost-walk-in-weighted-graph
3351-maximize-happiness-of-selected-children
3372-longest-strictly-increasing-or-strictly-decreasing-subarray
3380-shortest-subarray-with-or-at-least-k-ii
3427-special-array-ii
3430-count-days-without-meetings
3434-find-the-number-of-distinct-colors-among-the-balls
3459-find-the-minimum-area-to-cover-all-ones-ii
3461-find-the-minimum-area-to-cover-all-ones-i
3466-number-of-subarrays-with-and-value-of-k
3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i
3483-alternating-groups-ii
3490-find-the-maximum-length-of-valid-subsequence-i
3491-find-the-maximum-length-of-valid-subsequence-ii
3555-final-array-state-after-k-multiplication-operations-i
3592-find-x-sum-of-all-k-long-subarrays-ii
3621-minimum-operations-to-make-array-values-equal-to-k
3627-find-minimum-time-to-reach-last-room-i
3628-find-minimum-time-to-reach-last-room-ii
3639-zero-array-transformation-i
3648-find-the-maximum-number-of-fruits-collected
3649-minimum-time-to-break-locks-i
3651-transformed-array
3653-maximum-subarray-sum-with-length-divisible-by-k
3656-minimum-number-of-operations-to-make-elements-in-array-distinct
3657-check-if-grid-can-be-cut-into-sections
3677-maximum-amount-of-money-robot-can-earn
3714-maximum-and-minimum-sums-of-at-most-size-k-subsequences
3733-length-of-longest-v-shaped-diagonal-segment
3741-reschedule-meetings-for-maximum-free-time-ii
3743-reschedule-meetings-for-maximum-free-time-i
3748-sort-matrix-by-diagonals
3788-maximum-unique-subarray-sum-after-deletion
3790-fruits-into-baskets-ii
3800-longest-common-prefix-between-adjacent-strings-after-removals
3837-grid-teleportation-traversal
3853-minimum-weighted-subgraph-with-the-required-paths-ii

Breadth-First Search

0101-symmetric-tree
0104-maximum-depth-of-binary-tree
0297-serialize-and-deserialize-binary-tree
0310-minimum-height-trees
0407-trapping-rain-water-ii
0417-pacific-atlantic-water-flow
0433-minimum-genetic-mutation
0449-serialize-and-deserialize-bst
0684-redundant-connection
0854-making-a-large-island
0893-all-nodes-distance-k-in-binary-tree
0945-snakes-and-ladders
0955-complete-binary-tree-inserter
1218-lowest-common-ancestor-of-deepest-leaves
1387-find-elements-in-a-contaminated-binary-tree
1396-count-servers-that-communicate
1409-minimum-number-of-flips-to-convert-binary-matrix-to-zero-matrix
1414-shortest-path-in-a-grid-with-obstacles-elimination
1436-get-watched-videos-by-your-friends
1485-minimum-cost-to-make-at-least-one-valid-path-in-a-grid
1558-course-schedule-iv
1876-map-of-highest-peak
2104-operations-on-tree
2151-the-time-when-the-network-becomes-idle
2213-find-all-people-with-secret
2375-minimum-obstacle-removal-to-reach-corner
2545-height-of-binary-tree-after-subtree-removal-queries
2558-minimum-number-of-operations-to-sort-a-binary-tree-by-level
2564-most-profitable-path-in-a-tree
2568-minimum-fuel-cost-to-report-to-the-capital
2583-divide-nodes-into-the-maximum-number-of-groups
2588-maximum-number-of-points-from-grid-queries
2646-kth-largest-sum-in-a-binary-tree
2677-cousins-in-binary-tree-ii
2711-minimum-time-to-visit-a-cell-in-a-grid
2764-maximum-number-of-fish-in-a-grid
2793-count-the-number-of-complete-components
3239-minimum-number-of-operations-to-make-x-and-y-equal
3439-find-minimum-diameter-after-merging-two-trees
3633-maximize-the-number-of-target-nodes-after-connecting-trees-i
3645-maximize-the-number-of-target-nodes-after-connecting-trees-ii
3837-grid-teleportation-traversal

Math

0223-rectangle-area
0224-basic-calculator
0231-power-of-two
0241-different-ways-to-add-parentheses
0282-expression-add-operators
0326-power-of-three
0342-power-of-four
0368-largest-divisible-subset
0372-super-pow
0384-shuffle-an-array
0396-rotate-function
0453-minimum-moves-to-equal-array-elements
0462-minimum-moves-to-equal-array-elements-ii
0539-minimum-time-difference
0592-fraction-addition-and-subtraction
0670-maximum-swap
0679-24-game
0755-reach-a-number
0797-rabbits-in-forest
0826-soup-servings
0900-reordered-power-of-2
0912-random-pick-with-weight
0946-smallest-range-ii
0989-largest-component-size-by-common-factor
1048-clumsy-factorial
1295-minimum-garden-perimeter-to-collect-enough-apples
1448-maximum-69-number
1477-product-of-the-last-k-numbers
1500-count-largest-group
1529-max-difference-you-can-get-from-changing-an-integer
1585-the-kth-factor-of-n
1631-number-of-sub-arrays-with-odd-sum
1678-number-of-ways-to-split-a-string
1889-check-if-number-is-a-sum-of-powers-of-three
1993-sum-of-all-subset-xor-totals
2050-count-good-numbers
2160-minimum-operations-to-make-a-uni-value-grid
2174-next-greater-numerically-balanced-number
2432-number-of-zero-filled-subarrays
2448-count-number-of-bad-pairs
2531-create-components-with-same-value
2541-sum-of-number-and-its-reverse
2604-minimum-operations-to-make-array-equal-ii
2610-closest-prime-numbers-in-range
2649-count-total-number-of-colored-cells
2716-prime-subtraction-operation
2871-double-a-number-represented-as-a-linked-list
2998-count-symmetric-integers
3172-divisible-and-non-divisible-sums-difference
3201-distribute-candies-among-children-ii
3227-find-missing-and-repeated-values
3279-alice-and-bob-playing-flower-game
3321-type-of-triangle
3555-final-array-state-after-k-multiplication-operations-i
3600-find-the-k-th-character-in-string-game-i
3601-find-the-k-th-character-in-string-game-ii
3682-count-the-number-of-arrays-with-k-matching-adjacent-elements
3714-maximum-and-minimum-sums-of-at-most-size-k-subsequences
3754-maximum-manhattan-distance-after-k-changes
3817-maximum-containers-on-a-ship

String

0005-longest-palindromic-substring
0010-regular-expression-matching
0030-substring-with-concatenation-of-all-words
0038-count-and-say
0131-palindrome-partitioning
0179-largest-number
0214-shortest-palindrome
0224-basic-calculator
0241-different-ways-to-add-parentheses
0282-expression-add-operators
0297-serialize-and-deserialize-binary-tree
0318-maximum-product-of-word-lengths
0331-verify-preorder-serialization-of-a-binary-tree
0345-reverse-vowels-of-a-string
0394-decode-string
0424-longest-repeating-character-replacement
0433-minimum-genetic-mutation
0449-serialize-and-deserialize-bst
0474-ones-and-zeroes
0524-longest-word-in-dictionary-through-deleting
0539-minimum-time-difference
0567-permutation-in-string
0592-fraction-addition-and-subtraction
0676-implement-magic-dictionary
0677-map-sum-pairs
0678-valid-parenthesis-string
0691-stickers-to-spell-word
0746-prefix-and-suffix-search
0768-partition-labels
0808-number-of-matching-subsequences
0812-rotate-string
0855-count-unique-characters-of-all-substrings-of-a-given-string
0878-shifting-letters
0920-uncommon-words-from-two-sentences
0952-word-subsets
1000-delete-columns-to-make-sorted-iii
1023-time-based-key-value-store
1032-satisfiability-of-equality-equations
1058-lexicographically-smallest-equivalent-string
1093-recover-a-tree-from-preorder-traversal
1159-smallest-subsequence-of-distinct-characters
1160-letter-tile-possibilities
1170-shortest-common-supersequence
1197-parsing-a-boolean-expression
1261-swap-for-longest-repeated-character-substring
1302-delete-characters-to-make-fancy-string
1304-longest-happy-string
1350-remove-sub-folders-from-the-filesystem
1351-replace-the-substring-for-balanced-string
1423-maximum-number-of-occurrences-of-a-substring
1460-number-of-substrings-containing-all-three-characters
1483-rank-teams-by-votes
1502-construct-k-palindrome-strings
1508-longest-happy-prefix
1516-the-k-th-lexicographical-string-of-all-happy-strings-of-length-n
1524-string-matching-in-an-array
1561-rearrange-words-in-a-sentence
1562-people-whose-list-of-favorite-companies-is-not-a-subset-of-another-list
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
1667-find-kth-bit-in-nth-binary-string
1678-number-of-ways-to-split-a-string
1700-minimum-time-to-make-rope-colorful
1715-split-a-string-into-the-max-number-of-unique-substrings
1744-number-of-ways-to-form-a-target-string-given-a-dictionary
1859-change-minimum-characters-to-satisfy-one-of-three-conditions
1871-palindrome-partitioning-iv
1895-minimum-number-of-operations-to-move-all-balls-to-each-box
1897-maximize-palindrome-length-from-subsequences
1915-check-if-one-string-swap-can-make-strings-equal
1923-sentence-similarity-iii
2021-remove-all-occurrences-of-a-substring
2059-unique-length-3-palindromic-subsequences
2095-minimum-number-of-swaps-to-make-the-string-balanced
2107-find-unique-binary-string
2113-find-the-kth-largest-integer-in-the-array
2140-longest-subsequence-repeated-k-times
2220-find-all-possible-recipes-from-given-supplies
2221-check-if-a-parentheses-string-can-be-valid
2232-adding-spaces-to-a-string
2237-longest-palindrome-by-concatenating-two-letter-words
2260-divide-a-string-into-groups-of-size-k
2275-find-substring-with-given-hash-value
2285-design-bitset
2292-counting-words-with-a-given-prefix
2300-construct-string-with-repeat-limit
2311-minimum-white-tiles-after-covering-with-carpets
2346-largest-3-same-digit-number-in-string
2389-design-a-text-editor
2395-longest-binary-subsequence-less-than-or-equal-to-k
2414-move-pieces-to-obtain-a-string
2456-construct-smallest-number-from-di-string
2463-minimum-recolors-to-get-k-consecutive-black-blocks
2465-shifting-letters-ii
2494-sum-of-prefix-scores-of-strings
2520-using-a-robot-to-print-the-lexicographically-smallest-string
2580-circular-sentence
2599-take-k-of-each-character-from-left-and-right
2691-count-vowel-strings-in-ranges
2755-extra-characters-in-a-string
3018-make-string-a-subsequence-using-cyclic-increments
3033-apply-operations-to-make-two-strings-equal
3142-longest-unequal-adjacent-groups-subsequence-ii
3150-shortest-and-lexicographically-smallest-beautiful-string
3174-minimum-number-of-changes-to-make-binary-string-beautiful
3194-find-words-containing-character
3195-separate-black-and-white-balls
3267-find-longest-special-substring-that-occurs-thrice-i
3329-find-the-length-of-the-longest-common-prefix
3360-minimum-deletions-to-make-string-k-special
3396-valid-word
3445-lexicographically-minimum-string-after-removing-stars
3447-clear-digits
3451-string-compression-iii
3455-minimum-length-of-string-after-operations
3569-count-of-substrings-containing-every-vowel-and-k-consonants-ii
3617-find-the-original-typed-string-i
3683-find-the-lexicographically-largest-string-from-the-box-i
3753-maximum-difference-between-even-and-odd-frequency-i
3754-maximum-manhattan-distance-after-k-changes
3800-longest-common-prefix-between-adjacent-strings-after-removals

Sorting

0179-largest-number
0324-wiggle-sort-ii
0368-largest-divisible-subset
0462-minimum-moves-to-equal-array-elements-ii
0524-longest-word-in-dictionary-through-deleting
0539-minimum-time-difference
0594-longest-harmonious-subsequence
0719-find-k-th-smallest-pair-distance
0759-set-intersection-size-at-least-two
0779-max-chunks-to-make-sorted-ii
0780-max-chunks-to-make-sorted
0808-number-of-matching-subsequences
0852-friends-of-appropriate-ages
0876-hand-of-straights
0900-reordered-power-of-2
0901-advantage-shuffle
0946-smallest-range-ii
0959-3sum-with-multiplicity
0991-array-of-doubled-pairs
1095-two-city-scheduling
1140-distant-barcodes
1169-largest-values-from-labels
1256-rank-transform-of-an-array
1352-maximum-profit-in-job-scheduling
1422-divide-array-in-sets-of-k-consecutive-numbers
1436-get-watched-videos-by-your-friends
1468-check-if-n-and-its-double-exist
1478-maximum-number-of-events-that-can-be-attended
1483-rank-teams-by-votes
1561-rearrange-words-in-a-sentence
1621-number-of-subsequences-that-satisfy-the-given-sum-condition
1798-max-number-of-k-sum-pairs
1851-maximum-number-of-events-that-can-be-attended-ii
1930-maximum-number-of-consecutive-values-you-can-make
1946-minimum-absolute-sum-difference
1966-frequency-of-the-most-frequent-element
2113-find-the-kth-largest-integer-in-the-array
2160-minimum-operations-to-make-a-uni-value-grid
2164-two-best-non-overlapping-events
2179-most-beautiful-item-for-each-query
2180-maximum-number-of-tasks-you-can-assign
2204-find-subsequence-of-length-k-with-the-largest-sum
2213-find-all-people-with-secret
2387-partition-array-such-that-maximum-difference-is-k
2473-max-sum-of-a-pair-with-equal-sum-of-digits
2479-meeting-rooms-iii
2497-maximum-matching-of-players-with-trainers
2554-minimum-total-distance-traveled
2581-divide-players-into-teams-of-equal-skill
2586-longest-square-streak-in-an-array
2588-maximum-number-of-points-from-grid-queries
2600-maximum-tastiness-of-candy-basket
2640-maximum-number-of-integers-to-choose-from-a-range-i
2646-kth-largest-sum-in-a-binary-tree
2681-put-marbles-in-bags
2689-rearranging-fruits
2695-find-score-of-an-array-after-marking-all-elements
2699-count-the-number-of-fair-pairs
2839-maximum-sum-queries
2845-find-the-value-of-the-partition
2888-minimum-index-of-a-valid-split
2891-maximum-beauty-of-an-array-after-applying-operation
3151-minimum-processing-time
3218-find-number-of-coins-to-place-in-tree-nodes
3219-make-lexicographically-smallest-array-by-swapping-elements
3241-divide-array-into-arrays-with-max-difference
3291-find-if-array-can-be-sorted
3307-find-the-maximum-sum-of-node-values
3321-type-of-triangle
3351-maximize-happiness-of-selected-children
3360-minimum-deletions-to-make-string-k-special
3430-count-days-without-meetings
3657-check-if-grid-can-be-cut-into-sections
3714-maximum-and-minimum-sums-of-at-most-size-k-subsequences
3748-sort-matrix-by-diagonals

Design

0173-binary-search-tree-iterator
0284-peeking-iterator
0297-serialize-and-deserialize-binary-tree
0432-all-oone-data-structure
0449-serialize-and-deserialize-bst
0676-implement-magic-dictionary
0677-map-sum-pairs
0729-my-calendar-i
0731-my-calendar-ii
0746-prefix-and-suffix-search
0838-design-linked-list
0859-design-circular-deque
0860-design-circular-queue
0936-rle-iterator
0937-online-stock-span
0955-complete-binary-tree-inserter
0969-number-of-recent-calls
1023-time-based-key-value-store
1262-online-majority-element-in-subarray
1337-design-skiplist
1387-find-elements-in-a-contaminated-binary-tree
1477-product-of-the-last-k-numbers
1497-design-a-stack-with-increment-operation
1767-design-front-middle-back-queue
1905-design-authentication-manager
1953-finding-mk-average
1995-finding-pairs-with-a-certain-sum
2104-operations-on-tree
2161-stock-price-fluctuation
2178-walking-robot-simulation-ii
2285-design-bitset
2389-design-a-text-editor
2434-design-a-number-container-system
2512-longest-uploaded-prefix
2587-design-memory-allocator

Binary Search Tree

0099-recover-binary-search-tree
0173-binary-search-tree-iterator
0209-minimum-size-subarray-sum
0300-longest-increasing-subsequence
0327-count-of-range-sum
0449-serialize-and-deserialize-bst
0669-trim-a-binary-search-tree
0719-find-k-th-smallest-pair-distance
0729-my-calendar-i
0731-my-calendar-ii
0755-reach-a-number
0808-number-of-matching-subsequences
0852-friends-of-appropriate-ages
0892-shortest-subarray-with-sum-at-least-k
0912-random-pick-with-weight
1023-time-based-key-value-store
1262-online-majority-element-in-subarray
1295-minimum-garden-perimeter-to-collect-enough-apples
1352-maximum-profit-in-job-scheduling
1468-check-if-n-and-its-double-exist
1550-find-the-kth-smallest-sum-of-a-matrix-with-sorted-rows
1573-find-two-non-overlapping-sub-arrays-each-with-target-sum
1621-number-of-subsequences-that-satisfy-the-given-sum-condition
1679-shortest-subarray-to-be-removed-to-make-array-sorted
1766-minimum-number-of-removals-to-make-mountain-array
1772-create-sorted-array-through-instructions
1851-maximum-number-of-events-that-can-be-attended-ii
1886-minimum-limit-of-balls-in-a-bag
1946-minimum-absolute-sum-difference
1966-frequency-of-the-most-frequent-element
2150-kth-smallest-product-of-two-sorted-arrays
2164-two-best-non-overlapping-events
2179-most-beautiful-item-for-each-query
2180-maximum-number-of-tasks-you-can-assign
2188-minimized-maximum-of-products-distributed-to-any-store
2229-maximum-fruits-harvested-after-at-most-k-steps
2394-count-subarrays-with-score-less-than-k
2449-maximum-number-of-robots-within-budget
2498-smallest-subarrays-with-maximum-bitwise-or
2512-longest-uploaded-prefix
2513-number-of-pairs-satisfying-inequality
2586-longest-square-streak-in-an-array
2591-frog-jump-ii
2600-maximum-tastiness-of-candy-basket
2640-maximum-number-of-integers-to-choose-from-a-range-i
2665-minimum-time-to-repair-cars
2699-count-the-number-of-fair-pairs
2716-prime-subtraction-operation
2839-maximum-sum-queries
2891-maximum-beauty-of-an-array-after-applying-operation
3000-minimum-absolute-difference-between-elements-with-constraint
3181-find-building-where-alice-and-bob-can-meet
3267-find-longest-special-substring-that-occurs-thrice-i
3427-special-array-ii
3466-number-of-subarrays-with-and-value-of-k
3790-fruits-into-baskets-ii

Hash Table

0030-substring-with-concatenation-of-all-words
0073-set-matrix-zeroes
0424-longest-repeating-character-replacement
0432-all-oone-data-structure
0433-minimum-genetic-mutation
0454-4sum-ii
0480-sliding-window-median
0554-brick-wall
0567-permutation-in-string
0594-longest-harmonious-subsequence
0676-implement-magic-dictionary
0677-map-sum-pairs
0691-stickers-to-spell-word
0746-prefix-and-suffix-search
0768-partition-labels
0797-rabbits-in-forest
0808-number-of-matching-subsequences
0835-linked-list-components
0855-count-unique-characters-of-all-substrings-of-a-given-string
0876-hand-of-straights
0893-all-nodes-distance-k-in-binary-tree
0900-reordered-power-of-2
0905-length-of-longest-fibonacci-subsequence
0920-uncommon-words-from-two-sentences
0925-construct-binary-tree-from-preorder-and-postorder-traversal
0940-fruit-into-baskets
0952-word-subsets
0959-3sum-with-multiplicity
0989-largest-component-size-by-common-factor
0991-array-of-doubled-pairs
1023-time-based-key-value-store
1055-pairs-of-songs-with-total-durations-divisible-by-60
1140-distant-barcodes
1147-flip-columns-for-maximum-number-of-equal-rows
1160-letter-tile-possibilities
1169-largest-values-from-labels
1218-lowest-common-ancestor-of-deepest-leaves
1219-longest-well-performing-interval
1227-number-of-equivalent-domino-pairs
1256-rank-transform-of-an-array
1261-swap-for-longest-repeated-character-substring
1364-tuple-with-same-product
1387-find-elements-in-a-contaminated-binary-tree
1409-minimum-number-of-flips-to-convert-binary-matrix-to-zero-matrix
1422-divide-array-in-sets-of-k-consecutive-numbers
1423-maximum-number-of-occurrences-of-a-substring
1436-get-watched-videos-by-your-friends
1460-number-of-substrings-containing-all-three-characters
1468-check-if-n-and-its-double-exist
1483-rank-teams-by-votes
1500-count-largest-group
1502-construct-k-palindrome-strings
1510-find-lucky-integer-in-an-array
1562-people-whose-list-of-favorite-companies-is-not-a-subset-of-another-list
1573-find-two-non-overlapping-sub-arrays-each-with-target-sum
1694-make-sum-divisible-by-p
1715-split-a-string-into-the-max-number-of-unique-substrings
1798-max-number-of-k-sum-pairs
1813-maximum-erasure-value
1830-count-good-meals
1859-change-minimum-characters-to-satisfy-one-of-three-conditions
1905-design-authentication-manager
1915-check-if-one-string-swap-can-make-strings-equal
1995-finding-pairs-with-a-certain-sum
2054-the-number-of-the-smallest-unoccupied-chair
2059-unique-length-3-palindromic-subsequences
2104-operations-on-tree
2107-find-unique-binary-string
2161-stock-price-fluctuation
2174-next-greater-numerically-balanced-number
2204-find-subsequence-of-length-k-with-the-largest-sum
2220-find-all-possible-recipes-from-given-supplies
2237-longest-palindrome-by-concatenating-two-letter-words
2285-design-bitset
2300-construct-string-with-repeat-limit
2308-divide-array-into-equal-pairs
2356-largest-combination-with-bitwise-and-greater-than-zero
2362-minimum-rounds-to-complete-all-tasks
2388-replace-elements-in-an-array
2434-design-a-number-container-system
2448-count-number-of-bad-pairs
2473-max-sum-of-a-pair-with-equal-sum-of-digits
2479-meeting-rooms-iii
2520-using-a-robot-to-print-the-lexicographically-smallest-string
2552-maximum-sum-of-distinct-subarrays-with-length-k
2581-divide-players-into-teams-of-equal-skill
2586-longest-square-streak-in-an-array
2587-design-memory-allocator
2599-take-k-of-each-character-from-left-and-right
2626-count-the-number-of-good-subarrays
2640-maximum-number-of-integers-to-choose-from-a-range-i
2677-cousins-in-binary-tree-ii
2685-first-completely-painted-row-or-column
2689-rearranging-fruits
2695-find-score-of-an-array-after-marking-all-elements
2707-merge-two-2d-arrays-by-summing-values
2755-extra-characters-in-a-string
2766-find-the-prefix-common-array-of-two-arrays
2856-count-complete-subarrays-in-an-array
2888-minimum-index-of-a-valid-split
2915-count-of-interesting-subarrays
3227-find-missing-and-repeated-values
3267-find-longest-special-substring-that-occurs-thrice-i
3329-find-the-length-of-the-longest-common-prefix
3360-minimum-deletions-to-make-string-k-special
3434-find-the-number-of-distinct-colors-among-the-balls
3445-lexicographically-minimum-string-after-removing-stars
3455-minimum-length-of-string-after-operations
3569-count-of-substrings-containing-every-vowel-and-k-consonants-ii
3592-find-x-sum-of-all-k-long-subarrays-ii
3621-minimum-operations-to-make-array-values-equal-to-k
3653-maximum-subarray-sum-with-length-divisible-by-k
3656-minimum-number-of-operations-to-make-elements-in-array-distinct
3753-maximum-difference-between-even-and-odd-frequency-i
3754-maximum-manhattan-distance-after-k-changes
3788-maximum-unique-subarray-sum-after-deletion
3837-grid-teleportation-traversal

Trie

0386-lexicographical-numbers
0676-implement-magic-dictionary
0677-map-sum-pairs
0746-prefix-and-suffix-search
0808-number-of-matching-subsequences
1350-remove-sub-folders-from-the-filesystem
2494-sum-of-prefix-scores-of-strings
2755-extra-characters-in-a-string
3329-find-the-length-of-the-longest-common-prefix

Linked List

0025-reverse-nodes-in-k-group
0061-rotate-list
0083-remove-duplicates-from-sorted-list
0203-remove-linked-list-elements
0432-all-oone-data-structure
0835-linked-list-components
0838-design-linked-list
0859-design-circular-deque
0860-design-circular-queue
1072-next-greater-node-in-linked-list
1337-design-skiplist
1767-design-front-middle-back-queue
1905-design-authentication-manager
2374-steps-to-make-array-non-decreasing
2389-design-a-text-editor
2573-remove-nodes-from-linked-list
2871-double-a-number-represented-as-a-linked-list

Queue

0239-sliding-window-maximum
0859-design-circular-deque
0860-design-circular-queue
0892-shortest-subarray-with-sum-at-least-k
0969-number-of-recent-calls
1767-design-front-middle-back-queue
1953-finding-mk-average
2180-maximum-number-of-tasks-you-can-assign
2449-maximum-number-of-robots-within-budget
2527-count-subarrays-with-fixed-bounds
2868-continuous-subarrays
3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i

Counting

0594-longest-harmonious-subsequence
0900-reordered-power-of-2
0920-uncommon-words-from-two-sentences
0936-rle-iterator
0959-3sum-with-multiplicity
1055-pairs-of-songs-with-total-durations-divisible-by-60
1140-distant-barcodes
1160-letter-tile-possibilities
1169-largest-values-from-labels
1227-number-of-equivalent-domino-pairs
1364-tuple-with-same-product
1396-count-servers-that-communicate
1483-rank-teams-by-votes
1502-construct-k-palindrome-strings
1510-find-lucky-integer-in-an-array
1859-change-minimum-characters-to-satisfy-one-of-three-conditions
1915-check-if-one-string-swap-can-make-strings-equal
2140-longest-subsequence-repeated-k-times
2174-next-greater-numerically-balanced-number
2237-longest-palindrome-by-concatenating-two-letter-words
2300-construct-string-with-repeat-limit
2308-divide-array-into-equal-pairs
2356-largest-combination-with-bitwise-and-greater-than-zero
2362-minimum-rounds-to-complete-all-tasks
2448-count-number-of-bad-pairs
2494-sum-of-prefix-scores-of-strings
3267-find-longest-special-substring-that-occurs-thrice-i
3360-minimum-deletions-to-make-string-k-special
3455-minimum-length-of-string-after-operations
3753-maximum-difference-between-even-and-odd-frequency-i
3754-maximum-manhattan-distance-after-k-changes

Dynamic Programming

0005-longest-palindromic-substring
0010-regular-expression-matching
0118-pascals-triangle
0131-palindrome-partitioning
0174-dungeon-game
0241-different-ways-to-add-parentheses
0300-longest-increasing-subsequence
0337-house-robber-iii
0368-largest-divisible-subset
0376-wiggle-subsequence
0396-rotate-function
0397-integer-replacement
0413-arithmetic-slices
0416-partition-equal-subset-sum
0446-arithmetic-slices-ii-subsequence
0474-ones-and-zeroes
0494-target-sum
0526-beautiful-arrangement
0638-shopping-offers
0678-valid-parenthesis-string
0689-maximum-sum-of-3-non-overlapping-subarrays
0691-stickers-to-spell-word
0698-partition-to-k-equal-sum-subsets
0769-largest-plus-sign
0806-domino-and-tromino-tiling
0808-number-of-matching-subsequences
0819-minimum-swaps-to-make-sequences-increasing
0826-soup-servings
0831-largest-sum-of-averages
0855-count-unique-characters-of-all-substrings-of-a-given-string
0875-longest-mountain-in-array
0902-minimum-number-of-refueling-stops
0905-length-of-longest-fibonacci-subsequence
0934-bitwise-ors-of-subarrays
1000-delete-columns-to-make-sorted-iii
1020-longest-turbulent-subarray
1025-minimum-cost-for-tickets
1042-minimum-cost-to-merge-stones
1063-best-sightseeing-pair
1096-maximum-sum-of-two-non-overlapping-subarrays
1170-shortest-common-supersequence
1234-number-of-paths-with-max-score
1263-number-of-dice-rolls-with-target-sum
1352-maximum-profit-in-job-scheduling
1402-count-square-submatrices-with-all-ones
1573-find-two-non-overlapping-sub-arrays-each-with-target-sum
1586-longest-subarray-of-1s-after-deleting-one-element
1628-count-submatrices-with-all-ones
1631-number-of-sub-arrays-with-odd-sum
1676-minimum-number-of-days-to-eat-n-oranges
1700-minimum-time-to-make-rope-colorful
1716-maximum-non-negative-product-in-a-matrix
1740-count-subtrees-with-max-distance-between-cities
1744-number-of-ways-to-form-a-target-string-given-a-dictionary
1766-minimum-number-of-removals-to-make-mountain-array
1849-maximum-absolute-sum-of-any-subarray
1851-maximum-number-of-events-that-can-be-attended-ii
1871-palindrome-partitioning-iv
1897-maximize-palindrome-length-from-subsequences
2078-maximum-compatibility-score-sum
2090-number-of-ways-to-arrive-at-destination
2131-smallest-missing-genetic-value-in-each-subtree
2164-two-best-non-overlapping-events
2262-solving-questions-with-brainpower
2311-minimum-white-tiles-after-covering-with-carpets
2395-longest-binary-subsequence-less-than-or-equal-to-k
2554-minimum-total-distance-traveled
2562-count-ways-to-build-good-strings
2586-longest-square-streak-in-an-array
2601-number-of-great-partitions
2755-extra-characters-in-a-string
2794-maximum-number-of-moves-in-a-grid
2848-special-permutations
2882-ways-to-express-an-integer-as-sum-of-powers
2893-visit-array-positions-to-maximize-score
3033-apply-operations-to-make-two-strings-equal
3106-length-of-the-longest-subsequence-that-sums-to-target
3142-longest-unequal-adjacent-groups-subsequence-ii
3191-maximum-score-after-applying-operations-on-a-tree
3218-find-number-of-coins-to-place-in-tree-nodes
3239-minimum-number-of-operations-to-make-x-and-y-equal
3307-find-the-maximum-sum-of-node-values
3490-find-the-maximum-length-of-valid-subsequence-i
3491-find-the-maximum-length-of-valid-subsequence-ii
3648-find-the-maximum-number-of-fruits-collected
3649-minimum-time-to-break-locks-i
3677-maximum-amount-of-money-robot-can-earn
3714-maximum-and-minimum-sums-of-at-most-size-k-subsequences
3733-length-of-longest-v-shaped-diagonal-segment

Stack

0173-binary-search-tree-iterator
0224-basic-calculator
0331-verify-preorder-serialization-of-a-binary-tree
0394-decode-string
0678-valid-parenthesis-string
0739-daily-temperatures
0779-max-chunks-to-make-sorted-ii
0780-max-chunks-to-make-sorted
0937-online-stock-span
1048-clumsy-factorial
1072-next-greater-node-in-linked-list
1159-smallest-subsequence-of-distinct-characters
1197-parsing-a-boolean-expression
1219-longest-well-performing-interval
1497-design-a-stack-with-increment-operation
1570-final-prices-with-a-special-discount-in-a-shop
1628-count-submatrices-with-all-ones
1679-shortest-subarray-to-be-removed-to-make-array-sorted
2021-remove-all-occurrences-of-a-substring
2095-minimum-number-of-swaps-to-make-the-string-balanced
2221-check-if-a-parentheses-string-can-be-valid
2374-steps-to-make-array-non-decreasing
2389-design-a-text-editor
2456-construct-smallest-number-from-di-string
2520-using-a-robot-to-print-the-lexicographically-smallest-string
2573-remove-nodes-from-linked-list
2839-maximum-sum-queries
2871-double-a-number-represented-as-a-linked-list
3181-find-building-where-alice-and-bob-can-meet
3445-lexicographically-minimum-string-after-removing-stars
3447-clear-digits

Matrix

0073-set-matrix-zeroes
0174-dungeon-game
0407-trapping-rain-water-ii
0417-pacific-atlantic-water-flow
0498-diagonal-traverse
0854-making-a-large-island
0945-snakes-and-ladders
1147-flip-columns-for-maximum-number-of-equal-rows
1234-number-of-paths-with-max-score
1311-largest-magic-square
1331-path-with-maximum-gold
1342-queens-that-can-attack-the-king
1396-count-servers-that-communicate
1402-count-square-submatrices-with-all-ones
1409-minimum-number-of-flips-to-convert-binary-matrix-to-zero-matrix
1414-shortest-path-in-a-grid-with-obstacles-elimination
1485-minimum-cost-to-make-at-least-one-valid-path-in-a-grid
1550-find-the-kth-smallest-sum-of-a-matrix-with-sorted-rows
1628-count-submatrices-with-all-ones
1716-maximum-non-negative-product-in-a-matrix
1876-map-of-highest-peak
1972-rotating-the-box
2089-maximum-matrix-sum
2145-grid-game
2160-minimum-operations-to-make-a-uni-value-grid
2343-count-unguarded-cells-in-the-grid
2375-minimum-obstacle-removal-to-reach-corner
2588-maximum-number-of-points-from-grid-queries
2685-first-completely-painted-row-or-column
2711-minimum-time-to-visit-a-cell-in-a-grid
2764-maximum-number-of-fish-in-a-grid
2794-maximum-number-of-moves-in-a-grid
3227-find-missing-and-repeated-values
3459-find-the-minimum-area-to-cover-all-ones-ii
3461-find-the-minimum-area-to-cover-all-ones-i
3627-find-minimum-time-to-reach-last-room-i
3628-find-minimum-time-to-reach-last-room-ii
3648-find-the-maximum-number-of-fruits-collected
3677-maximum-amount-of-money-robot-can-earn
3733-length-of-longest-v-shaped-diagonal-segment
3748-sort-matrix-by-diagonals
3837-grid-teleportation-traversal

Monotonic Stack

0739-daily-temperatures
0779-max-chunks-to-make-sorted-ii
0780-max-chunks-to-make-sorted
0937-online-stock-span
1072-next-greater-node-in-linked-list
1159-smallest-subsequence-of-distinct-characters
1219-longest-well-performing-interval
1570-final-prices-with-a-special-discount-in-a-shop
1628-count-submatrices-with-all-ones
1679-shortest-subarray-to-be-removed-to-make-array-sorted
2374-steps-to-make-array-non-decreasing
2573-remove-nodes-from-linked-list
2839-maximum-sum-queries
3181-find-building-where-alice-and-bob-can-meet

Simulation

0498-diagonal-traverse
0592-fraction-addition-and-subtraction
1048-clumsy-factorial
1342-queens-that-can-attack-the-king
1667-find-kth-bit-in-nth-binary-string
2021-remove-all-occurrences-of-a-substring
2048-build-array-from-permutation
2178-walking-robot-simulation-ii
2228-watering-plants-ii
2232-adding-spaces-to-a-string
2260-divide-a-string-into-groups-of-size-k
2265-partition-array-according-to-given-pivot
2343-count-unguarded-cells-in-the-grid
2388-replace-elements-in-an-array
2389-design-a-text-editor
2479-meeting-rooms-iii
2551-apply-operations-to-an-array
2587-design-memory-allocator
2692-take-gifts-from-the-richest-pile
2695-find-score-of-an-array-after-marking-all-elements
3332-minimum-operations-to-exceed-threshold-value-ii
3434-find-the-number-of-distinct-colors-among-the-balls
3447-clear-digits
3555-final-array-state-after-k-multiplication-operations-i
3600-find-the-k-th-character-in-string-game-i
3651-transformed-array
3790-fruits-into-baskets-ii

Doubly-Linked List

0432-all-oone-data-structure
1905-design-authentication-manager
2389-design-a-text-editor

Sliding Window

0030-substring-with-concatenation-of-all-words
0209-minimum-size-subarray-sum
0239-sliding-window-maximum
0413-arithmetic-slices
0424-longest-repeating-character-replacement
0480-sliding-window-median
0567-permutation-in-string
0594-longest-harmonious-subsequence
0713-subarray-product-less-than-k
0892-shortest-subarray-with-sum-at-least-k
0940-fruit-into-baskets
1020-longest-turbulent-subarray
1096-maximum-sum-of-two-non-overlapping-subarrays
1261-swap-for-longest-repeated-character-substring
1351-replace-the-substring-for-balanced-string
1423-maximum-number-of-occurrences-of-a-substring
1445-number-of-sub-arrays-of-size-k-and-average-greater-than-or-equal-to-threshold
1460-number-of-substrings-containing-all-three-characters
1538-maximum-points-you-can-obtain-from-cards
1573-find-two-non-overlapping-sub-arrays-each-with-target-sum
1586-longest-subarray-of-1s-after-deleting-one-element
1755-defuse-the-bomb
1813-maximum-erasure-value
1966-frequency-of-the-most-frequent-element
2229-maximum-fruits-harvested-after-at-most-k-steps
2275-find-substring-with-given-hash-value
2394-count-subarrays-with-score-less-than-k
2449-maximum-number-of-robots-within-budget
2463-minimum-recolors-to-get-k-consecutive-black-blocks
2478-longest-nice-subarray
2498-smallest-subarrays-with-maximum-bitwise-or
2527-count-subarrays-with-fixed-bounds
2552-maximum-sum-of-distinct-subarrays-with-length-k
2599-take-k-of-each-character-from-left-and-right
2626-count-the-number-of-good-subarrays
2856-count-complete-subarrays-in-an-array
2868-continuous-subarrays
2891-maximum-beauty-of-an-array-after-applying-operation
3150-shortest-and-lexicographically-smallest-beautiful-string
3213-count-subarrays-where-max-element-appears-at-least-k-times
3267-find-longest-special-substring-that-occurs-thrice-i
3380-shortest-subarray-with-or-at-least-k-ii
3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i
3483-alternating-groups-ii
3569-count-of-substrings-containing-every-vowel-and-k-consonants-ii
3592-find-x-sum-of-all-k-long-subarrays-ii
3743-reschedule-meetings-for-maximum-free-time-i

Iterator

0173-binary-search-tree-iterator
0284-peeking-iterator
0936-rle-iterator

Greedy

0179-largest-number
0324-wiggle-sort-ii
0376-wiggle-subsequence
0397-integer-replacement
0670-maximum-swap
0678-valid-parenthesis-string
0759-set-intersection-size-at-least-two
0768-partition-labels
0779-max-chunks-to-make-sorted-ii
0780-max-chunks-to-make-sorted
0797-rabbits-in-forest
0876-hand-of-straights
0901-advantage-shuffle
0902-minimum-number-of-refueling-stops
0946-smallest-range-ii
0991-array-of-doubled-pairs
1095-two-city-scheduling
1140-distant-barcodes
1159-smallest-subsequence-of-distinct-characters
1169-largest-values-from-labels
1304-longest-happy-string
1422-divide-array-in-sets-of-k-consecutive-numbers
1448-maximum-69-number
1478-maximum-number-of-events-that-can-be-attended
1502-construct-k-palindrome-strings
1529-max-difference-you-can-get-from-changing-an-integer
1700-minimum-time-to-make-rope-colorful
1766-minimum-number-of-removals-to-make-mountain-array
1874-form-array-by-concatenating-subarrays-of-another-array
1917-maximum-average-pass-ratio
1930-maximum-number-of-consecutive-values-you-can-make
1966-frequency-of-the-most-frequent-element
2066-add-minimum-number-of-rungs
2089-maximum-matrix-sum
2095-minimum-number-of-swaps-to-make-the-string-balanced
2140-longest-subsequence-repeated-k-times
2180-maximum-number-of-tasks-you-can-assign
2221-check-if-a-parentheses-string-can-be-valid
2237-longest-palindrome-by-concatenating-two-letter-words
2300-construct-string-with-repeat-limit
2362-minimum-rounds-to-complete-all-tasks
2387-partition-array-such-that-maximum-difference-is-k
2395-longest-binary-subsequence-less-than-or-equal-to-k
2456-construct-smallest-number-from-di-string
2497-maximum-matching-of-players-with-trainers
2520-using-a-robot-to-print-the-lexicographically-smallest-string
2591-frog-jump-ii
2600-maximum-tastiness-of-candy-basket
2604-minimum-operations-to-make-array-equal-ii
2616-maximal-score-after-applying-k-operations
2640-maximum-number-of-integers-to-choose-from-a-range-i
2681-put-marbles-in-bags
2689-rearranging-fruits
2716-prime-subtraction-operation
2872-largest-element-in-an-array-after-merge-operations
3151-minimum-processing-time
3171-minimum-equal-sum-of-two-arrays-after-replacing-zeros
3195-separate-black-and-white-balls
3241-divide-array-into-arrays-with-max-difference
3307-find-the-maximum-sum-of-node-values
3351-maximize-happiness-of-selected-children
3360-minimum-deletions-to-make-string-k-special
3445-lexicographically-minimum-string-after-removing-stars
3741-reschedule-meetings-for-maximum-free-time-ii
3743-reschedule-meetings-for-maximum-free-time-i
3788-maximum-unique-subarray-sum-after-deletion

Data Stream

0937-online-stock-span
0969-number-of-recent-calls
1477-product-of-the-last-k-numbers
1767-design-front-middle-back-queue
1953-finding-mk-average
2161-stock-price-fluctuation

Recursion

0010-regular-expression-matching
0025-reverse-nodes-in-k-group
0203-remove-linked-list-elements
0224-basic-calculator
0231-power-of-two
0241-different-ways-to-add-parentheses
0326-power-of-three
0342-power-of-four
0394-decode-string
1197-parsing-a-boolean-expression
1667-find-kth-bit-in-nth-binary-string
2050-count-good-numbers
2573-remove-nodes-from-linked-list
3600-find-the-k-th-character-in-string-game-i
3601-find-the-k-th-character-in-string-game-ii

Memoization

0241-different-ways-to-add-parentheses
0397-integer-replacement
0638-shopping-offers
0691-stickers-to-spell-word
0698-partition-to-k-equal-sum-subsets
1676-minimum-number-of-days-to-eat-n-oranges
2395-longest-binary-subsequence-less-than-or-equal-to-k
3239-minimum-number-of-operations-to-make-x-and-y-equal
3733-length-of-longest-v-shaped-diagonal-segment

Rolling Hash

0214-shortest-palindrome
1508-longest-happy-prefix
2275-find-substring-with-given-hash-value

String Matching

0214-shortest-palindrome
0812-rotate-string
1508-longest-happy-prefix
1524-string-matching-in-an-array
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
1874-form-array-by-concatenating-subarrays-of-another-array
2292-counting-words-with-a-given-prefix

Hash Function

0214-shortest-palindrome
1508-longest-happy-prefix
2275-find-substring-with-given-hash-value

Two Pointers

0005-longest-palindromic-substring
0031-next-permutation
0061-rotate-list
0345-reverse-vowels-of-a-string
0524-longest-word-in-dictionary-through-deleting
0567-permutation-in-string
0719-find-k-th-smallest-pair-distance
0768-partition-labels
0852-friends-of-appropriate-ages
0875-longest-mountain-in-array
0901-advantage-shuffle
0959-3sum-with-multiplicity
1028-interval-list-intersections
1468-check-if-n-and-its-double-exist
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
1621-number-of-subsequences-that-satisfy-the-given-sum-condition
1679-shortest-subarray-to-be-removed-to-make-array-sorted
1798-max-number-of-k-sum-pairs
1874-form-array-by-concatenating-subarrays-of-another-array
1923-sentence-similarity-iii
1972-rotating-the-box
2095-minimum-number-of-swaps-to-make-the-string-balanced
2228-watering-plants-ii
2232-adding-spaces-to-a-string
2265-partition-array-according-to-given-pivot
2320-find-all-k-distant-indices-in-an-array
2414-move-pieces-to-obtain-a-string
2497-maximum-matching-of-players-with-trainers
2551-apply-operations-to-an-array
2581-divide-players-into-teams-of-equal-skill
2588-maximum-number-of-points-from-grid-queries
2699-count-the-number-of-fair-pairs
2707-merge-two-2d-arrays-by-summing-values
3018-make-string-a-subsequence-using-cyclic-increments
3165-find-indices-with-index-and-value-difference-i
3170-find-indices-with-index-and-value-difference-ii
3195-separate-black-and-white-balls
3683-find-the-lexicographically-largest-string-from-the-box-i

Segment Tree

0218-the-skyline-problem
0327-count-of-range-sum
0699-falling-squares
0729-my-calendar-i
0731-my-calendar-ii
1262-online-majority-element-in-subarray
1772-create-sorted-array-through-instructions
2512-longest-uploaded-prefix
2513-number-of-pairs-satisfying-inequality
2839-maximum-sum-queries
3181-find-building-where-alice-and-bob-can-meet
3466-number-of-subarrays-with-and-value-of-k
3790-fruits-into-baskets-ii

Ordered Set

0218-the-skyline-problem
0327-count-of-range-sum
0699-falling-squares
0729-my-calendar-i
0731-my-calendar-ii
1772-create-sorted-array-through-instructions
1946-minimum-absolute-sum-difference
1953-finding-mk-average
2161-stock-price-fluctuation
2434-design-a-number-container-system
2512-longest-uploaded-prefix
2513-number-of-pairs-satisfying-inequality
2868-continuous-subarrays
3000-minimum-absolute-difference-between-elements-with-constraint
3790-fruits-into-baskets-ii

Backtracking

0051-n-queens
0131-palindrome-partitioning
0282-expression-add-operators
0494-target-sum
0526-beautiful-arrangement
0638-shopping-offers
0679-24-game
0691-stickers-to-spell-word
0698-partition-to-k-equal-sum-subsets
1160-letter-tile-possibilities
1331-path-with-maximum-gold
1516-the-k-th-lexicographical-string-of-all-happy-strings-of-length-n
1715-split-a-string-into-the-max-number-of-unique-substrings
1819-construct-the-lexicographically-largest-valid-sequence
1993-sum-of-all-subset-xor-totals
2078-maximum-compatibility-score-sum
2107-find-unique-binary-string
2140-longest-subsequence-repeated-k-times
2170-count-number-of-maximum-bitwise-or-subsets
2174-next-greater-numerically-balanced-number
2456-construct-smallest-number-from-di-string
3649-minimum-time-to-break-locks-i

Prefix Sum

0209-minimum-size-subarray-sum
0731-my-calendar-ii
0831-largest-sum-of-averages
0878-shifting-letters
0892-shortest-subarray-with-sum-at-least-k
0912-random-pick-with-weight
1042-minimum-cost-to-merge-stones
1219-longest-well-performing-interval
1311-largest-magic-square
1477-product-of-the-last-k-numbers
1538-maximum-points-you-can-obtain-from-cards
1631-number-of-sub-arrays-with-odd-sum
1694-make-sum-divisible-by-p
1783-ways-to-make-a-fair-array
1859-change-minimum-characters-to-satisfy-one-of-three-conditions
1895-minimum-number-of-operations-to-move-all-balls-to-each-box
1940-maximum-xor-for-each-query
1966-frequency-of-the-most-frequent-element
2059-unique-length-3-palindromic-subsequences
2145-grid-game
2229-maximum-fruits-harvested-after-at-most-k-steps
2249-count-the-hidden-sequences
2311-minimum-white-tiles-after-covering-with-carpets
2358-number-of-ways-to-split-array
2394-count-subarrays-with-score-less-than-k
2449-maximum-number-of-robots-within-budget
2465-shifting-letters-ii
2529-range-product-queries-of-powers
2691-count-vowel-strings-in-ranges
2915-count-of-interesting-subarrays
3427-special-array-ii
3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i
3639-zero-array-transformation-i
3653-maximum-subarray-sum-with-length-divisible-by-k

Divide and Conquer

0218-the-skyline-problem
0324-wiggle-sort-ii
0327-count-of-range-sum
0372-super-pow
0925-construct-binary-tree-from-preorder-and-postorder-traversal
1772-create-sorted-array-through-instructions
2113-find-the-kth-largest-integer-in-the-array
2513-number-of-pairs-satisfying-inequality

Heap (Priority Queue)

0218-the-skyline-problem
0239-sliding-window-maximum
0407-trapping-rain-water-ii
0480-sliding-window-median
0892-shortest-subarray-with-sum-at-least-k
0902-minimum-number-of-refueling-stops
0918-reachable-nodes-in-subdivided-graph
1140-distant-barcodes
1304-longest-happy-string
1478-maximum-number-of-events-that-can-be-attended
1485-minimum-cost-to-make-at-least-one-valid-path-in-a-grid
1550-find-the-kth-smallest-sum-of-a-matrix-with-sorted-rows
1917-maximum-average-pass-ratio
1953-finding-mk-average
2054-the-number-of-the-smallest-unoccupied-chair
2113-find-the-kth-largest-integer-in-the-array
2161-stock-price-fluctuation
2164-two-best-non-overlapping-events
2204-find-subsequence-of-length-k-with-the-largest-sum
2300-construct-string-with-repeat-limit
2375-minimum-obstacle-removal-to-reach-corner
2434-design-a-number-container-system
2449-maximum-number-of-robots-within-budget
2473-max-sum-of-a-pair-with-equal-sum-of-digits
2479-meeting-rooms-iii
2512-longest-uploaded-prefix
2588-maximum-number-of-points-from-grid-queries
2616-maximal-score-after-applying-k-operations
2681-put-marbles-in-bags
2692-take-gifts-from-the-richest-pile
2695-find-score-of-an-array-after-marking-all-elements
2711-minimum-time-to-visit-a-cell-in-a-grid
2868-continuous-subarrays
3181-find-building-where-alice-and-bob-can-meet
3217-number-of-possible-sets-of-closing-branches
3218-find-number-of-coins-to-place-in-tree-nodes
3332-minimum-operations-to-exceed-threshold-value-ii
3445-lexicographically-minimum-string-after-removing-stars
3555-final-array-state-after-k-multiplication-operations-i
3592-find-x-sum-of-all-k-long-subarrays-ii
3627-find-minimum-time-to-reach-last-room-i
3628-find-minimum-time-to-reach-last-room-ii

Union Find

0684-redundant-connection
0854-making-a-large-island
0989-largest-component-size-by-common-factor
1032-satisfiability-of-equality-equations
1058-lexicographically-smallest-equivalent-string
1396-count-servers-that-communicate
2131-smallest-missing-genetic-value-in-each-subtree
2213-find-all-people-with-secret
2512-longest-uploaded-prefix
2583-divide-nodes-into-the-maximum-number-of-groups
2588-maximum-number-of-points-from-grid-queries
2764-maximum-number-of-fish-in-a-grid
2793-count-the-number-of-complete-components
3219-make-lexicographically-smallest-array-by-swapping-elements
3348-minimum-cost-walk-in-weighted-graph

Binary Indexed Tree

0218-the-skyline-problem
0327-count-of-range-sum
1262-online-majority-element-in-subarray
1772-create-sorted-array-through-instructions
2512-longest-uploaded-prefix
2513-number-of-pairs-satisfying-inequality
2839-maximum-sum-queries
3181-find-building-where-alice-and-bob-can-meet

Geometry

0223-rectangle-area

Randomized

0384-shuffle-an-array
0912-random-pick-with-weight

Bit Manipulation

0231-power-of-two
0318-maximum-product-of-word-lengths
0342-power-of-four
0397-integer-replacement
0526-beautiful-arrangement
0638-shopping-offers
0691-stickers-to-spell-word
0698-partition-to-k-equal-sum-subsets
0934-bitwise-ors-of-subarrays
1409-minimum-number-of-flips-to-convert-binary-matrix-to-zero-matrix
1740-count-subtrees-with-max-distance-between-cities
1940-maximum-xor-for-each-query
1993-sum-of-all-subset-xor-totals
2059-unique-length-3-palindromic-subsequences
2078-maximum-compatibility-score-sum
2170-count-number-of-maximum-bitwise-or-subsets
2308-divide-array-into-equal-pairs
2356-largest-combination-with-bitwise-and-greater-than-zero
2478-longest-nice-subarray
2498-smallest-subarrays-with-maximum-bitwise-or
2503-longest-subarray-with-maximum-bitwise-and
2529-range-product-queries-of-powers
2533-bitwise-xor-of-all-pairings
2766-find-the-prefix-common-array-of-two-arrays
2792-neighboring-bitwise-xor
2848-special-permutations
3217-number-of-possible-sets-of-closing-branches
3291-find-if-array-can-be-sorted
3307-find-the-maximum-sum-of-node-values
3348-minimum-cost-walk-in-weighted-graph
3380-shortest-subarray-with-or-at-least-k-ii
3394-minimum-array-end
3466-number-of-subarrays-with-and-value-of-k
3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i
3600-find-the-k-th-character-in-string-game-i
3601-find-the-k-th-character-in-string-game-ii
3649-minimum-time-to-break-locks-i

Enumeration

0875-longest-mountain-in-array
0900-reordered-power-of-2
1656-count-good-triplets
1740-count-subtrees-with-max-distance-between-cities
1993-sum-of-all-subset-xor-totals
2140-longest-subsequence-repeated-k-times
2170-count-number-of-maximum-bitwise-or-subsets
2174-next-greater-numerically-balanced-number
2531-create-components-with-same-value
2541-sum-of-number-and-its-reverse
2998-count-symmetric-integers
3201-distribute-candies-among-children-ii
3217-number-of-possible-sets-of-closing-branches
3459-find-the-minimum-area-to-cover-all-ones-ii
3683-find-the-lexicographically-largest-string-from-the-box-i
3741-reschedule-meetings-for-maximum-free-time-ii

Monotonic Queue

0239-sliding-window-maximum
0892-shortest-subarray-with-sum-at-least-k
2180-maximum-number-of-tasks-you-can-assign
2449-maximum-number-of-robots-within-budget
2527-count-subarrays-with-fixed-bounds
2868-continuous-subarrays

Graph

0310-minimum-height-trees
0684-redundant-connection
0918-reachable-nodes-in-subdivided-graph
1032-satisfiability-of-equality-equations
1436-get-watched-videos-by-your-friends
1485-minimum-cost-to-make-at-least-one-valid-path-in-a-grid
1558-course-schedule-iv
2090-number-of-ways-to-arrive-at-destination
2151-the-time-when-the-network-becomes-idle
2201-valid-arrangement-of-pairs
2213-find-all-people-with-secret
2220-find-all-possible-recipes-from-given-supplies
2246-maximum-employees-to-be-invited-to-a-meeting
2375-minimum-obstacle-removal-to-reach-corner
2438-find-closest-node-to-given-two-nodes
2564-most-profitable-path-in-a-tree
2568-minimum-fuel-cost-to-report-to-the-capital
2583-divide-nodes-into-the-maximum-number-of-groups
2711-minimum-time-to-visit-a-cell-in-a-grid
2793-count-the-number-of-complete-components
3189-find-champion-ii
3217-number-of-possible-sets-of-closing-branches
3348-minimum-cost-walk-in-weighted-graph
3439-find-minimum-diameter-after-merging-two-trees
3627-find-minimum-time-to-reach-last-room-i
3628-find-minimum-time-to-reach-last-room-ii

Topological Sort

0310-minimum-height-trees
1558-course-schedule-iv
2090-number-of-ways-to-arrive-at-destination
2220-find-all-possible-recipes-from-given-supplies
2246-maximum-employees-to-be-invited-to-a-meeting

Shortest Path

0918-reachable-nodes-in-subdivided-graph
1485-minimum-cost-to-make-at-least-one-valid-path-in-a-grid
2090-number-of-ways-to-arrive-at-destination
2375-minimum-obstacle-removal-to-reach-corner
2711-minimum-time-to-visit-a-cell-in-a-grid
3217-number-of-possible-sets-of-closing-branches
3627-find-minimum-time-to-reach-last-room-i
3628-find-minimum-time-to-reach-last-room-ii

Number Theory

0989-largest-component-size-by-common-factor
1585-the-kth-factor-of-n
2610-closest-prime-numbers-in-range
2716-prime-subtraction-operation

Bitmask

0526-beautiful-arrangement
0638-shopping-offers
0691-stickers-to-spell-word
0698-partition-to-k-equal-sum-subsets
1740-count-subtrees-with-max-distance-between-cities
2078-maximum-compatibility-score-sum
2848-special-permutations
3649-minimum-time-to-break-locks-i

Merge Sort

0327-count-of-range-sum
1772-create-sorted-array-through-instructions
2513-number-of-pairs-satisfying-inequality

Database

0175-combine-two-tables
0176-second-highest-salary
0177-nth-highest-salary
0181-employees-earning-more-than-their-managers
0182-duplicate-emails
0183-customers-who-never-order
0196-delete-duplicate-emails
0577-employee-bonus
1292-immediate-food-delivery-ii
1670-patients-with-a-condition
1801-average-time-of-process-per-machine
1811-fix-names-in-a-table

Eulerian Circuit

2201-valid-arrangement-of-pairs

Line Sweep

0218-the-skyline-problem

Quickselect

0324-wiggle-sort-ii
2113-find-the-kth-largest-integer-in-the-array

Brainteaser

2503-longest-subarray-with-maximum-bitwise-and
2533-bitwise-xor-of-all-pairings

Combinatorics

1993-sum-of-all-subset-xor-totals
3201-distribute-candies-among-children-ii
3682-count-the-number-of-arrays-with-k-matching-adjacent-elements
3714-maximum-and-minimum-sums-of-at-most-size-k-subsequences

Probability and Statistics

0826-soup-servings