java:

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int m = sc.nextInt();
		int n = sc.nextInt();
		int[][] arr = new int[m][n];
		for(int i = 0; i < m; i++) {
			for(int j = 0; j < n; j++) {
				arr[i][j] = sc.nextInt();
			}
		}
		sc.close();
		for(int i = 0; i < n; i++) {
			for(int j = 0; j < m; j++) {
				System.out.print(arr[j][n-1-i] + " ");
			}
			System.out.println();
		}
	}
}
 

c++:

#include<iostream>
using namespace std;
int a[1000][1000];
int main() {
    int m, n;
    int i, j;  
    cin>>n>>m;
        for (i = 0; i < n; i++)
		{
            for (j = 0; j < m; j ++) 
			{  
                cin>>a[i][j];
            }
        } 
        for (i = 1; i <= m; i++)
		{
            for (j = 0; j < n; j ++)
			{              
                if (j == n-1)
				{
                    cout<<a[j][m-i]<<endl;
                }
				else 
				{
                    cout<<a[j][m-i]<<" ";
                }
            }
        }
    return 0;
}