Merge pull request #1296 from 0xff-dev/3000

Add solution and test-cases for problem 3000

Author: 6boris

leetcode/2901-3000/3000.Maximum-Area-of-Longest-Diagonal-Rectangle/README.md

@@ -1,28 +1,30 @@
 # [3000.Maximum Area of Longest Diagonal Rectangle][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
+You are given a 2D **0-indexed** integer array `dimensions`.
+
+For all indices `i`, `0 <= i < dimensions.length`, `dimensions[i][0]` represents the length and `dimensions[i][1]` represents the width of the rectangle `i`.
+
+Return the **area** of the rectangle having the **longest** diagonal. If there are multiple rectangles with the longest diagonal, return the area of the rectangle having the **maximum** area.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: dimensions = [[9,3],[8,6]]
+Output: 48
+Explanation: 
+For index = 0, length = 9 and width = 3. Diagonal length = sqrt(9 * 9 + 3 * 3) = sqrt(90) ≈ 9.487.
+For index = 1, length = 8 and width = 6. Diagonal length = sqrt(8 * 8 + 6 * 6) = sqrt(100) = 10.
+So, the rectangle at index 1 has a greater diagonal length therefore we return area = 8 * 6 = 48.
 ```
 
-## 题意
-> ...
+**Example 2:**
 
-## 题解
-
-### 思路1
-> ...
-Maximum Area of Longest Diagonal Rectangle
-```go
 ```
-
+Input: dimensions = [[3,4],[4,3]]
+Output: 12
+Explanation: Length of diagonal is the same for both which is 5, so maximum area = 12.
+```
 
 ## 结语
 

leetcode/2901-3000/3000.Maximum-Area-of-Longest-Diagonal-Rectangle/Solution.go

@@ -1,5 +1,17 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(dimensions [][]int) int {
+	diagonal, area := 0, 0
+	for _, n := range dimensions {
+		tmp := n[0]*n[0] + n[1]*n[1]
+		if tmp == diagonal {
+			area = max(area, n[0]*n[1])
+		}
+		if tmp > diagonal {
+			diagonal = tmp
+			area = n[0] * n[1]
+		}
+	}
+
+	return area
 }

leetcode/2901-3000/3000.Maximum-Area-of-Longest-Diagonal-Rectangle/Solution_test.go

@@ -10,12 +10,11 @@ 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{{9, 3}, {8, 6}}, 48},
+		{"TestCase2", [][]int{{3, 4}, {4, 3}}, 12},
 	}
 
 	//	开始测试
@@ -30,10 +29,10 @@ 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() {
 }