test2

//test2
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main(void) {
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    int n;
    vector<int> a(0);
    cin >> n;
    while (n != 0) {
        a.push_back(n % 2);
        n >>= 1;
    }
    reverse(a.begin(), a.end());
    for (int i = 0; i < a.size(); ++ i)
        cout << a[i];
    return 0;
}