bEipo4 - Online C++0x Compiler & Debugging Tool

/******************************************************************************

                              Online C++ Compiler.
               Code, Compile, Run and Debug C++ program online.
Write your code in this editor and press "Run" button to compile and execute it.

*******************************************************************************/

#include <iostream>
#include <vector>
using namespace std;
int ans = 0;
vector< int >fun(int n , int k){
    vector < int > v;
    long long prod = 1 ;
    int N = n;
    bool ck = 1;
    for (int i = 2 ; i * i <= n ; i ++){

        while (n % i == 0){
            n/=i;
            v.push_back(i);
            prod *= i;
            if (v.size() == k - 1 && n != 1){
                v.push_back(N/prod);
                ck = false;
                break;
            }
            }
            if (!ck)break;

            }
            if (n != 1 && ck )v.push_back(n);
            return v;


}
int main()
{
    long long n , k;
    cin >> n >> k;
    if (k == 1){cout << n; return 0;}

    vector <int > v =  fun(n , k);
    if (v.size() == k){
        for (int i = 0 ; i < v.size(); i ++){
            cout << v[i] <<" ";
        }
    }
    else cout << -1 ;

    return 0;
}