#include <iostream>
#include <string>
#include <algorithm>
#include <utility>
#include <cmath>
#include <cstdlib>
#include <map>
#include <set>
#include <queue>
#include <vector>
using namespace std;

int main() {
	string N; cin >> N;
	int A = N.size();
	if (N[0] == '-') cout << 0 << endl;
	else {
		if (A <= 2) cout << 0 << endl;
		else {
			for (int i = 0; i < A - 2; i++) {
				cout << N[i];
			}
			cout << endl;
		}
	}
}