Add solution and test-cases for problem 1526

Author: 0xff-dev

leetcode/1501-1600/1526.Minimum-Number-of-Increments-on-Subarrays-to-Form-a-Target-Array/README.md

@@ -1,28 +1,41 @@
 # [1526.Minimum Number of Increments on Subarrays to Form a Target Array][title]
 
-> [!WARNING|style:flat]
-> This question is temporarily unanswered if you have good ideas. Welcome to [Create Pull Request PR](https://github.com/kylesliu/awesome-golang-algorithm)
-
 ## Description
+ou are given an integer array `target`. You have an integer array `initial` of the same size as `target` with all elements initially zeros.
+
+In one operation you can choose **any** subarray from `initial` and increment each value by one.
+
+Return the minimum number of operations to form a `target` array from `initial`.
+
+The test cases are generated so that the answer fits in a 32-bit integer.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: target = [1,2,3,2,1]
+Output: 3
+Explanation: We need at least 3 operations to form the target array from the initial array.
+[0,0,0,0,0] increment 1 from index 0 to 4 (inclusive).
+[1,1,1,1,1] increment 1 from index 1 to 3 (inclusive).
+[1,2,2,2,1] increment 1 at index 2.
+[1,2,3,2,1] target array is formed.
 ```
 
-## 题意
-> ...
-
-## 题解
+**Example 2:**
 
-### 思路1
-> ...
-Minimum Number of Increments on Subarrays to Form a Target Array
-```go
 ```
+Input: target = [3,1,1,2]
+Output: 4
+Explanation: [0,0,0,0] -> [1,1,1,1] -> [1,1,1,2] -> [2,1,1,2] -> [3,1,1,2]
+```
+
+**Example 3:**
 
+```
+Input: target = [3,1,5,4,2]
+Output: 7
+Explanation: [0,0,0,0,0] -> [1,1,1,1,1] -> [2,1,1,1,1] -> [3,1,1,1,1] -> [3,1,2,2,2] -> [3,1,3,3,2] -> [3,1,4,4,2] -> [3,1,5,4,2].
+```
 
 ## 结语
 

leetcode/1501-1600/1526.Minimum-Number-of-Increments-on-Subarrays-to-Form-a-Target-Array/Solution.go

@@ -1,5 +1,10 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(target []int) int {
+	n := len(target)
+	ans := target[0]
+	for i := 1; i < n; i++ {
+		ans += max(target[i]-target[i-1], 0)
+	}
+	return ans
 }

leetcode/1501-1600/1526.Minimum-Number-of-Increments-on-Subarrays-to-Form-a-Target-Array/Solution_test.go

@@ -10,12 +10,12 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
-		expect bool
+		inputs []int
+		expect int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", []int{1, 2, 3, 2, 1}, 3},
+		{"TestCase2", []int{3, 1, 1, 2}, 4},
+		{"TestCase3", []int{3, 1, 5, 4, 2}, 7},
 	}
 
 	//	开始测试
@@ -30,10 +30,10 @@ func TestSolution(t *testing.T) {
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }