HDU-2500 做一个正气的杭电人

#include <iostream>
#include <stdlib.h>
#include <string.h>
#include <vector>
#include <algorithm>
#include <iostream>
#include <string>

using namespace std;
int main()
{
    int N;
    string HDU = "HDU";
    while(cin >> N)
    {
        int n;
        while(N --)
        {
            cin >> n;
            int row = 3*n;
            int col = n;

            for(int i = 0; i < row; i ++)
            {
                for(int j = 0; j < col; j ++)
                {
                    cout << HDU;
                }
                cout << endl;
            }
        }
    }
    return 0;
}