#include<iostream>
#include<algorithm>
#include<vector>
using namespace std;

int n;
vector<int> num;

int main()
{
	cin>>n;
	while(n)
	{
		num.push_back(n%2);
		n/=2;
	}
	reverse(num.begin(),num.end());
	for(int i=0;i<num.size();i++)
		cout<<num[i];
	return 0;
}