Golang | Leetcode Golang题解之第542题01矩阵
题目：
题解：
type point struct{
x, y int
}
var dirs = []point{{-1, 0}, {1, 0}, {0, -1}, {0, 1}}
func updateMatrix(mat [][]int) [][]int {
var m, n = len(mat), len(mat[0])
var res = make([][]int, m)
var visited = make([][]bool, m)
var queue []point
for i := range mat{
res[i] = make([]int, n)
visited[i] = make([]bool, n)
for j := range mat[i]{
if mat[i][j] == 0 {
queue = append(queue, point{i, j})
visited[i][j] = true
}
}
}
for len(queue) != 0 {
cur := queue[0]
queue = queue[1:]
for _, dir := range dirs{
i, j := cur.x + dir.x, cur.y + dir.y
if i >=0 && i < m && j >=0 && j < n && !visited[i][j]{
res[i][j] = res[cur.x][cur.y] + 1
queue = append(queue, point{i,j})
visited[i][j] = true
}
}
}
return res
}