#include<iostream>
using namespace std;

int main()
{

    int num;
    cout << "Enter decimal number: ";
    cin >> num;
    
    int pow2 = 1;
    while (pow2 <=num )
       pow2 *= 2;
    
    pow2 /=2;
    
    while (pow2 > 0 )
    {
        cout << num/pow2;
        num = num % pow2;
        pow2 /= 2;
    }
    cout <<endl;

    system("pause");
    return 0;
}