Triangle Wave

#include <iostream>
using namespace std;
int main()
{
    int freq, amp, t, x = 1;
    cin >> t;
    cout << endl;
    for(int i = 1; i <= t; i++)
    {
        cin >> amp >> freq;
        cout << endl;
        x = 1;
        while(x <= freq)
        {


            for(int j = 1; j <= amp; j++)
            {
                for(int k = 0; k < j; k++)
                    cout << j;
            cout << endl;
            }

            for(int m = amp - 1; m >= 0; m--)
            {
                for(int k = 0; k < m; k++)
                    cout << m;
            cout << endl;
            }
            x++;
        }

    }
return 0;
}