#include<bits/stdc++.h>
using namespace std;
int main(){
    long long n;
    string a;
    cin>>n;
    if(n==0){
        cout<<0;
    }else{
        while(n!=0){
            a=char(n%2+'0')+a;
            n=n/2;
        }
        cout<<a;
    }
    return 0;
}
/**************************************************************
	Problem: 1108
	User: fuyijun
	Language: C++
	Result: Accepted
	Time:20 ms
	Memory:2072 kb
****************************************************************/