poj 1543 Perfect Cubes

#include <iostream>
#include <cstdio>
using namespace std;

int main()
{
int n, a, b, c, d, left, right;
cin >> n;
for (a = 2; a <= n; a++)
{
for (b = 2; b <= n; b++)
{
for (c = b+1; c <= n; c++)
{
for (d = c+1; d <= n; d++)
{
left = a * a * a;
right = b* b * b + c * c * c + d * d *d;
if (left == right)
printf("Cube = %d, Triple = (%d,%d,%d)\n", a, b, c, d);
}
}
}
}

system("pause");
}