#include<bits/stdc++.h>
using namespace std;
int main()  
{

	int n;
	cin>>n;
	int x;
	char c;
	string s;
	while(n!=0)
	{
		x=n%2;
		c=x+48;
		n=n/2;
		s=c+s;
	} 
	if(s=="")
	{
		cout<<0;
	}
	else
	{
		cout<<s;
	}
	return 0;
}
/**************************************************************
	Problem: 1108
	User: chenkexin
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2072 kb
****************************************************************/