题解 | 矩阵转置

import sys

n,m = map(int, input().split())
mat = [[0]*m for _ in range(n)]
mat1 = [[0]*n for _ in range(m)]
for i in range(n):
    mat[i] = list(map(int,input().split()))
for i in range(n):
    for j in range(m):
        mat1[j][i] = mat[i][j]
for i in range(m):
    print(*mat1[i])     # 逐行输出