题解来啦！！

#include<bits/stdc++.h>
using namespace std;
int main(){
    
int n ,m;
    cin >> n >> m;
    int a[110][110];
    for (int i = 1 ; i <= n ; i++){
        for (int j = 1 ; j <= m ; j++){
            cin >> a[i][j];
        }
    }
    for (int i = 1 ; i <= m ; i++){
        for (int j = 1 ; j <= n ; j++){
            cout << a[j][i] << " ";
        }
        cout << "\n";
    }
    return 0;
}