#include<iostream>
#include<algorithm>
#include<vector>

using namespace std;

void change(int x) {
	vector<int> q;
	while (x) {
		q.push_back(x % 2);
		x /= 2;
	}
	reverse(q.begin(),q.end());
	for (auto c : q) cout << c;
	cout << endl;
}

int main() {
	int x;
	cin >> x;
	change(x);
	return 0;
}