#include<bits/stdc++.h>
using namespace std;
int main(){
	long long n;
	int a[100]={0},k=0;
	cin>>n;
	while(n!=0){
		a[k++]=n%2;
		n=n/2;
	} 
	for(int i=k-1;i>=0;i--){
		cout<<a[i];
	}

	return 0;
}

/**************************************************************
	Problem: 1108
	User: xuanhua
	Language: C++
	Result: Wrong Answer
****************************************************************/