#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;
using ll = long long;

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

    if (s[0] == '-') {
        cout << 0 << endl;
    } else if (s.size() >= 3) {
        s.pop_back();
        s.pop_back();
        cout << s << endl;
    } else {
        cout << 0 << endl;
    }

    return 0;
}