Merge pull request #987 from 0xff-dev/1947

Add solution and test-cases for problem 1947

leetcode/1901-2000/1947.Maximum-Compatibility-Score-Sum/README.md

@@ -1,28 +1,37 @@
 # [1947.Maximum Compatibility Score Sum][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
+There is a survey that consists of `n` questions where each question's answer is either `0` (no) or e`1` (yes).
+
+The survey was given to `m` students numbered from `0` to `m - 1` and `m` mentors numbered from `0` to `m - 1`. The answers of the students are represented by a 2D integer array `students` where `students[i]` is an integer array that contains the answers of the `ith` student (**0-indexed**). The answers of the mentors are represented by a 2D integer array `mentors` where `mentors[j]` is an integer array that contains the answers of the `jth` mentor (**0-indexed**).
+
+Each student will be assigned to **one** mentor, and each mentor will have **one** student assigned to them. The **compatibility score** of a student-mentor pair is the number of answers that are the same for both the student and the mentor.
+
+- For example, if the student's answers were `[1, 0, 1]` and the mentor's answers were `[0, 0, 1]`, then their compatibility score is 2 because only the second and the third answers are the same.
+
+You are tasked with finding the optimal student-mentor pairings to **maximize** the **sum of the compatibility scores**.
+
+Given `students` and `mentors`, return the **maximum compatibility score sum** that can be achieved.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: students = [[1,1,0],[1,0,1],[0,0,1]], mentors = [[1,0,0],[0,0,1],[1,1,0]]
+Output: 8
+Explanation: We assign students to mentors in the following way:
+- student 0 to mentor 2 with a compatibility score of 3.
+- student 1 to mentor 0 with a compatibility score of 2.
+- student 2 to mentor 1 with a compatibility score of 3.
+The compatibility score sum is 3 + 2 + 3 = 8.
 ```
 
-## 题意
-> ...
-
-## 题解
+**Example 2:**
 
-### 思路1
-> ...
-Maximum Compatibility Score Sum
-```go
 ```
-
+Input: students = [[0,0],[0,0],[0,0]], mentors = [[1,1],[1,1],[1,1]]
+Output: 0
+Explanation: The compatibility score of any student-mentor pair is 0.
+```
 
 ## 结语
 

leetcode/1901-2000/1947.Maximum-Compatibility-Score-Sum/Solution.go

@@ -1,5 +1,35 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(students [][]int, mentors [][]int) int {
+	var (
+		dfs   func(int, []bool) int
+		match func(int, int) int
+	)
+	match = func(i, j int) int {
+		ans := 0
+		for k := range students[i] {
+			if mentors[j][k] == students[i][k] {
+				ans++
+			}
+		}
+		return ans
+	}
+
+	dfs = func(index int, used []bool) int {
+		cur := 0
+		if index == len(students) {
+			return cur
+		}
+
+		for i := range mentors {
+			if used[i] {
+				continue
+			}
+			used[i] = true
+			cur = max(cur, match(index, i)+dfs(index+1, used))
+			used[i] = false
+		}
+		return cur
+	}
+	return dfs(0, make([]bool, len(students)))
 }

leetcode/1901-2000/1947.Maximum-Compatibility-Score-Sum/Solution_test.go

@@ -9,31 +9,30 @@ import (
 func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
-		name   string
-		inputs bool
-		expect bool
+		name              string
+		students, mentors [][]int
+		expect            int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", [][]int{{1, 1, 0}, {1, 0, 1}, {0, 0, 1}}, [][]int{{1, 0, 0}, {0, 0, 1}, {1, 1, 0}}, 8},
+		{"TestCase2", [][]int{{0, 0}, {0, 0}, {0, 0}}, [][]int{{1, 1}, {1, 1}, {1, 1}}, 0},
 	}
 
 	//	开始测试
 	for i, c := range cases {
 		t.Run(c.name+" "+strconv.Itoa(i), func(t *testing.T) {
-			got := Solution(c.inputs)
+			got := Solution(c.students, c.mentors)
 			if !reflect.DeepEqual(got, c.expect) {
-				t.Fatalf("expected: %v, but got: %v, with inputs: %v",
-					c.expect, got, c.inputs)
+				t.Fatalf("expected: %v, but got: %v, with inputs: %v %v",
+					c.expect, got, c.students, c.mentors)
 			}
 		})
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }