#include <iostream>
#include <stdio.h>
#include <string>

using namespace std;

int main() {
	string s;
	cin >> s;

	if (s.at(0) == '-') {
		cout << 0 << endl;
	}
	else {
		if (size(s) <= 2) {
			cout << 0 << endl;
		}
		else {
			for (int i = 0; i < size(s) - 2; i++) {
				cout << s.at(i);
			}
		}
	}

	return 0;
}