summation of four primes

// Summation of Four Primes.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include <iostream>#include <vector>#include <math.h>using namespace std;bool IsPrime(int x){int y=(int)sqrt(x*1.0);for(int i=2;i<=y;++i){if(x%i==0)return false;}return true;}int _tmain(int argc, _TCHAR* argv[]){int FourPrimes[4]={0};vector<int>Primes;int n;int m;while(cin>>n){if(n==EOF)break;if(n<8)cout<<"Impossible."<<"/n";else{bool isFind=false;if(n%2==0){FourPrimes[0]=2;FourPrimes[1]=2;n-=4;}else{FourPrimes[0]=2;FourPrimes[1]=3;n-=5;}for(int i=2;i<n;++i){if(IsPrime(i)&&IsPrime(n-i)){FourPrimes[2]=i;FourPrimes[3]=n-i;isFind=true;break;}}if(isFind){cout<<FourPrimes[0]<<" "<<FourPrimes[1]<<" "<<FourPrimes[2]<<" "<<FourPrimes[3]<<"/n";}else cout<<"Impossible."<<"/n";}}return 0;}