//Bai 19

#include<bits/stdc++.h>
using namespace std;
#define el "\n"
#define ll long long
#define ull unsigned long long
#define se second
#define fi first
#define be begin()
#define en end()
#define Faster cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0);
int n;
void Run()
{
    cin >> n;
    string s = "";
    while(n)
    {
        s += (n % 2) + '0';
        n /= 2;
    }
    reverse(s.begin(), s.end());
    cout << s;
}
int main()
{
    Faster;
    Run();
    return 0;
}