#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,a[99],s=0;
    cin>>n;
    if(n==0) cout<<0;
    while(n!=0){
        a[s]=n%2;
        n/=2;
        s++;
    }
    for(s-=1;s>=0;s--){
        cout<<a[s];
    }
return 0;}
 
/**************************************************************
	Problem: 1108
	User: fzy001
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2072 kb
****************************************************************/