leetcode/100-n/867. 转置矩阵.md

func transpose(matrix [][]int) [][]int {
    ret := make([][]int, len(matrix[0]))
    for i := 0; i < len(matrix[0]); i++ {
        ret[i] = make([]int, len(matrix))
        for o := 0; o < len(matrix); o++ {
            ret[i][o] = matrix[o][i]
        }
    }
    return ret
}