#include<bits/stdc++.h> 
using namespace std; 
 
int main() { 
    long long n; 
    string s; 
    cin >> n; 
    if (n == 0) { 
        s = "0"; 
    } else { 
        while (n!= 0) { 
            long long x = n % 2; 
            s = to_string(x) + s; 
            n = n / 2; 
        } 
    } 
    cout << s; 
    return 0; 
} 
/**************************************************************
	Problem: 1108
	User: zhangailin
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2076 kb
****************************************************************/