#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=s+c;
	} 
	for(int i=s.size()-1;i>=0;i--)
	{
		cout<<s[i];
	}
	return 0;
}
/**************************************************************
	Problem: 1108
	User: chenkexin
	Language: C++
	Result: Wrong Answer
****************************************************************/