#include<bits/stdc++.h>
using namespace std;
int main(){
	long long n;
	int a[100]={0},k=0;
	cin>>n;
	if(n==0){
		cout<<"0";
	}
	else{
		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: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/