Merge pull request #1069 from 0xff-dev/1726

Add solution and test-cases for problem 1726

Author: 6boris

leetcode/1701-1800/1726.Tuple-with-Same-Product/README.md

@@ -1,28 +1,29 @@
 # [1726.Tuple with Same Product][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
+Given an array `nums` of **distinct** positive integers, return the number of tuples `(a, b, c, d)` such that `a * b = c * d` where `a`, `b`, `c`, and `d` are elements of `nums`, and `a != b != c != d`.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: nums = [2,3,4,6]
+Output: 8
+Explanation: There are 8 valid tuples:
+(2,6,3,4) , (2,6,4,3) , (6,2,3,4) , (6,2,4,3)
+(3,4,2,6) , (4,3,2,6) , (3,4,6,2) , (4,3,6,2)
 ```
 
-## 题意
-> ...
-
-## 题解
+**Example 2:**
 
-### 思路1
-> ...
-Tuple with Same Product
-```go
 ```
-
+Input: nums = [1,2,4,5,10]
+Output: 16
+Explanation: There are 16 valid tuples:
+(1,10,2,5) , (1,10,5,2) , (10,1,2,5) , (10,1,5,2)
+(2,5,1,10) , (2,5,10,1) , (5,2,1,10) , (5,2,10,1)
+(2,10,4,5) , (2,10,5,4) , (10,2,4,5) , (10,2,5,4)
+(4,5,2,10) , (4,5,10,2) , (5,4,2,10) , (5,4,10,2)
+```
 
 ## 结语
 

leetcode/1701-1800/1726.Tuple-with-Same-Product/Solution.go

@@ -1,5 +1,17 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(nums []int) int {
+	m := make(map[int]int)
+	l := len(nums)
+	for i := 0; i < l-1; i++ {
+		for j := i + 1; j < l; j++ {
+			cur := nums[i] * nums[j]
+			m[cur]++
+		}
+	}
+	ans := 0
+	for _, n := range m {
+		ans += (n - 1) * n / 2 * 8
+	}
+	return ans
 }

leetcode/1701-1800/1726.Tuple-with-Same-Product/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{2, 3, 4, 6}, 8},
+		{"TestCase2", []int{1, 2, 4, 5, 10}, 16},
 	}
 
 	//	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() {
 }