Merge pull request #1072 from 0xff-dev/1034

Add solution and test-cases for problem 1034

Author: 6boris

leetcode/1001-1100/1034.Coloring-A-Border/README.md

@@ -1,28 +1,38 @@
 # [1034.Coloring A Border][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` integer matrix `grid`, and three integers `row`, `col`, and `color`. Each value in the grid represents the color of the grid square at that location.
+
+Two squares are called **adjacent** if they are next to each other in any of the 4 directions.
+
+Two squares belong to the same **connected component** if they have the same color and they are adjacent.
+
+The **border of a connected component** is all the squares in the connected component that are either adjacent to (at least) a square not in the component, or on the boundary of the grid (the first or last row or column).
+
+You should color the **border** of the **connected component** that contains the square `grid[row][col]` with `color`.
+
+Return the final grid.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: grid = [[1,1],[1,2]], row = 0, col = 0, color = 3
+Output: [[3,3],[3,2]]
 ```
 
-## 题意
-> ...
+**Example 2:**
 
-## 题解
-
-### 思路1
-> ...
-Coloring A Border
-```go
 ```
+Input: grid = [[1,2,2],[2,3,2]], row = 0, col = 1, color = 3
+Output: [[1,3,3],[2,3,3]]
+```
+
+**Example 3:**
 
+```
+Input: grid = [[1,1,1],[1,1,1],[1,1,1]], row = 1, col = 1, color = 2
+Output: [[2,2,2],[2,1,2],[2,2,2]]
+```
 
 ## 结语
 

leetcode/1001-1100/1034.Coloring-A-Border/Solution.go

@@ -1,5 +1,39 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+var dirs1034 = [][2]int{
+	{1, 0}, {-1, 0}, {0, 1}, {0, -1},
+}
+
+func Solution(grid [][]int, row int, col int, color int) [][]int {
+	m, n := len(grid), len(grid[0])
+	initColor := grid[row][col]
+
+	queue := [][2]int{{row, col}}
+	v := map[[2]int]struct{}{
+		[2]int{row, col}: struct{}{},
+	}
+
+	pos := make([][2]int, 0)
+	for len(queue) > 0 {
+		nq := make([][2]int, 0)
+		for _, i := range queue {
+			for _, d := range dirs1034 {
+				nx, ny := i[0]+d[0], i[1]+d[1]
+				if nx < 0 || nx >= m || ny < 0 || ny >= n || grid[nx][ny] != initColor {
+					pos = append(pos, i)
+					continue
+				}
+				key := [2]int{nx, ny}
+				if _, ok := v[key]; !ok {
+					v[key] = struct{}{}
+					nq = append(nq, key)
+				}
+			}
+		}
+		queue = nq
+	}
+	for _, p := range pos {
+		grid[p[0]][p[1]] = color
+	}
+	return grid
 }

leetcode/1001-1100/1034.Coloring-A-Border/Solution_test.go

@@ -9,31 +9,32 @@ import (
 func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
-		name   string
-		inputs bool
-		expect bool
+		name            string
+		grid            [][]int
+		row, col, color int
+		expect          [][]int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", [][]int{{1, 1}, {1, 2}}, 0, 0, 3, [][]int{{3, 3}, {3, 2}}},
+		{"TestCase2", [][]int{{1, 2, 2}, {2, 3, 2}}, 0, 1, 3, [][]int{{1, 3, 3}, {2, 3, 3}}},
+		{"TestCase3", [][]int{{1, 1, 1}, {1, 1, 1}, {1, 1, 1}}, 1, 1, 2, [][]int{{2, 2, 2}, {2, 1, 2}, {2, 2, 2}}},
 	}
 
 	//	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.grid, c.row, c.col, c.color)
 			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 %v %v",
+					c.expect, got, c.grid, c.row, c.col, c.color)
 			}
 		})
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }