Add solution and test-cases for problem 2364

Author: 0xff-dev

leetcode/2301-2400/2364.Count-Number-of-Bad-Pairs/README.md

@@ -1,28 +1,30 @@
 # [2364.Count Number of Bad Pairs][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 **0-indexed** integer array `nums`. A pair of indices `(i, j)` is a **bad pair** if `i < j` and `j - i != nums[j] - nums[i]`.
+
+Return the total number of **bad pairs** in `nums`.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: nums = [4,1,3,3]
+Output: 5
+Explanation: The pair (0, 1) is a bad pair since 1 - 0 != 1 - 4.
+The pair (0, 2) is a bad pair since 2 - 0 != 3 - 4, 2 != -1.
+The pair (0, 3) is a bad pair since 3 - 0 != 3 - 4, 3 != -1.
+The pair (1, 2) is a bad pair since 2 - 1 != 3 - 1, 1 != 2.
+The pair (2, 3) is a bad pair since 3 - 2 != 3 - 3, 1 != 0.
+There are a total of 5 bad pairs, so we return 5.
 ```
 
-## 题意
-> ...
-
-## 题解
+**Example 2:**
 
-### 思路1
-> ...
-Count Number of Bad Pairs
-```go
 ```
-
+Input: nums = [1,2,3,4,5]
+Output: 0
+Explanation: There are no bad pairs.
+```
 
 ## 结语
 

leetcode/2301-2400/2364.Count-Number-of-Bad-Pairs/Solution.go

@@ -1,5 +1,17 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(nums []int) int64 {
+	l := len(nums)
+	diff := make(map[int]int64)
+	diff[0-nums[0]] = 1
+
+	var ans, count int64
+	count = 1
+	for i := 1; i < l; i++ {
+		a := i - nums[i]
+		ans += count - diff[a]
+		diff[a]++
+		count++
+	}
+	return ans
 }

leetcode/2301-2400/2364.Count-Number-of-Bad-Pairs/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 int64
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", []int{4, 1, 3, 3}, 5},
+		{"TestCase2", []int{1, 2, 3, 4, 5}, 0},
 	}
 
 	//	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() {
 }