#include 
#include 
#include 
#include 
using namespace std;

int main() {
    int n;
    cin >> n;
    string s = "";
    while(n > 0) {
        int ostatok = n % 2;
        s += (ostatok + '0');
        n /= 2;
    }
    reverse(s.begin(), s.end());
    cout << s << endl;
    return 0;
}