#include <iostream>
#include <vector>
using namespace std;
int main()
{
    int n;
    cin >> n;
    string binary = "";
    while(n > 0) {
        binary += (n % 2) + '0';
        n /= 2;
    }
    reverse(binary.begin(), binary.end());
    cout << binary << endl;

    return 0;
}