#include<bits/stdc++.h>
using namespace std;
int main(){
	int a[1000]={0},k=0,n;
	cin>>n;
	if(n==0){
		cout<<0;
	}
	while(n>0){
		a[k++]=n%2;
		n=n/2;
	}
	for(k=k-1;k>=0;k--){
		cout<<a[k];
	}
	return 0;
}

/**************************************************************
	Problem: 1108
	User: linyuhang
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/