【Leetcode】867. 转置矩阵（Transpose Matrix）

Leetcode - 967 Transpose Matrix (Easy)

题目描述：行列互换。

Input: [[1,2,3],[4,5,6],[7,8,9]]
Output: [[1,4,7],[2,5,8],[3,6,9]]

public int[][] transpose(int[][] A) {
    int[][] res = new int[A[0].length][A.length];
    for (int i = 0; i < A.length; i++) {
        for (int j = 0; j < A[0].length; j++) {
            res[j][i] = A[i][j];
        }
    }
    return res;
}