UVa - 138 - Street Numbers

#include <iostream>
#include <cstdio>
#include <math.h>
#define loop1 if(n == y){printf("%10lld% 10lld\n", n, x);t++;}
#define loop2 if(t == 10)break;x++;
using namespace std;

int main()
{
    long long n, x = 8, t = 0;
    double y;
    while(true)
    {
        y=sqrt((x * x + x) / 2);
        n = y;
        loop1;
        loop2;
    }
return 0;
}