Merge pull request #879 from 0xff-dev/861

Add solution and test-cases for problem 861

Author: 6boris

leetcode/801-900/0861.Score-After-Flipping-Matrix/README.md

@@ -1,28 +1,30 @@
 # [861.Score After Flipping Matrix][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 an `m x n` binary matrix `grid`.
 
-**Example 1:**
+A **move** consists of choosing any row or column and toggling each value in that row or column (i.e., changing all `0`'s to `1`'s, and all `1`'s to `0`'s).
 
-```
-Input: a = "11", b = "1"
-Output: "100"
-```
+Every row of the matrix is interpreted as a binary number, and the **score** of the matrix is the sum of these numbers.
+
+Return the highest possible **score** after making any number of **moves** (including zero moves).
 
-## 题意
-> ...
+**Example 1:**  
 
-## 题解
+![1](./lc-toogle1.jpeg)
 
-### 思路1
-> ...
-Score After Flipping Matrix
-```go
 ```
+Input: grid = [[0,0,1,1],[1,0,1,0],[1,1,0,0]]
+Output: 39
+Explanation: 0b1111 + 0b1001 + 0b1111 = 15 + 9 + 15 = 39
+```
+
+**Example 2:**
 
+```
+Input: grid = [[0]]
+Output: 1
+```
 
 ## 结语
 

leetcode/801-900/0861.Score-After-Flipping-Matrix/Solution.go

@@ -1,5 +1,35 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(grid [][]int) int {
+	rows, cols := len(grid), len(grid[0])
+	for i := 0; i < rows; i++ {
+		if grid[i][0] == 0 {
+			for j := 0; j < cols; j++ {
+				grid[i][j] = 1 - grid[i][j]
+			}
+		}
+	}
+	for c := 1; c < cols; c++ {
+		ones := 0
+		for r := 0; r < rows; r++ {
+			if grid[r][c] == 1 {
+				ones++
+			}
+		}
+		if ones < rows-ones {
+			for r := 0; r < rows; r++ {
+				grid[r][c] = 1 - grid[r][c]
+			}
+		}
+	}
+
+	ans := 0
+	for i := 0; i < rows; i++ {
+		cur := 0
+		for j := 0; j < cols; j++ {
+			cur = cur*2 + grid[i][j]
+		}
+		ans += cur
+	}
+	return ans
 }

leetcode/801-900/0861.Score-After-Flipping-Matrix/Solution_test.go

@@ -10,12 +10,13 @@ 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{
+			{0, 0, 1, 1}, {1, 0, 1, 0}, {1, 1, 0, 0},
+		}, 39},
+		{"TestCase2", [][]int{{0}}, 1},
 	}
 
 	//	开始测试
@@ -30,10 +31,10 @@ 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() {
 }