#include <bits/stdc++.h>
using namespace std;

int main(){
	int N;
	cin >> N;
	string n;
	n = to_string(N);
	if (N > 99) cout << n;
	else if(N > 9 && N < 100) cout << "0" + n;
	else cout << "00" + n; 

	return 0;
}