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

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