SOC

#include <iostream>

using namespace std;

int main()
{
    int n, nr[9],i = 0;
    cin>>n;
    while(n != 0)
    {
        nr[i] = n%2;
        i++;
        n = n/2;
    }
    for(int j = i-1; j >= 0; j--)
        cout<<nr[j];
}