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;
        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;
            }
            if(x != freq) //blank line after each wave exept last one
                cout << endl;
            x++;


        }

        if(i % 2 == 0) //blank line after each 2 cases
            cout << endl;
    }
return 0;
}