pe142

#include <stdio.h>
#include <math.h>

int isPerfect(int n)
{
    int h = n & 0xF;

    if (h <= 9)
    {
        if (h != 2 && h != 3 && h != 5 && h != 6 && h != 7 && h != 8)
        {
            int t = sqrtf(n);
            return t*t == n;
        }
    }

    return 0;
}

int main()
{
    int x, y, z;

    for (x=3;; x++)
    {
        for (y=2; y<x; y++)
        {
            if (!isPerfect(x+y) || !isPerfect(x-y))
                continue;

            for (z=1; z<y; z++)
            {
                if (isPerfect(x+z) && isPerfect(x-z) &&
                    isPerfect(y+z) && isPerfect(y-z))
                {
                    printf("%d\n", x+y+z);
                    return 0;
                }
            }
        }
    }

    return 0;
}