#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

string get_binary(int a)
{
	string res = "";
	while(a)
	{
		res += a%2+'0';
		a /= 2;
	}
	reverse(res.begin(), res.end());
	return res;
}
int main()
{
	int a;
	cin >> a;
	cout << get_binary(a) << endl;
	return 0;
}