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

typedef long long ll;
#define int ll
#define endl '\n'
#define pii pair<int , int>
#define _FastIO ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define pb push_back
#define pii pair<int , int>
#define F first
#define S second
#define M_PI 3.14159265358979323846
const int mod = 1000000007;
const int MAXX = 1e6 + 5;

string s;

signed main()
{
    _FastIO;
    cin >> s;
    if(s[0] == '-'){
        cout << "0" << endl;
        return 0;
    }
    int n = s.size();
    if(n < 3){
        cout << "0" << endl;
        return 0;
    }
    for(int i = 0; i < (n - 2); i++){
        cout << s[i];
    }
    cout << endl;
    return 0;
}