枚举——完美立方和

//
// Created by 朱正天 on 2017/8/10.

//http://blog.csdn.net/qiqi_skystar/article/details/50768467

#include <iostream>
#include <cstdio>
#include <cmath>
#define EPS 1e-6

using namespace std;

int main()
{
int a,b,c,d;
int N=5;
//    cin>>N;
for(a=2;a<=N;a++)
for(b=1;b<a;b++)
for(c=b;c<a;c++)
for(d=c;d<a;d++)
{
if(a*a==b*b+c*c+d*d)
cout<<a<<": "<<b<<" "<<c<< " "<<d;
}

return 0;
}