#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a[99],s=0;
	cin>>n;
	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: Wrong Answer
****************************************************************/