#include <bits/stdc++.h>
using namespace std;
#define FAST ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define pb push_back
#define fixx(n) fixed << setprecision(n)
#define F first
#define S second
#define PI  3.14159265358979323846
#define ll  long long int
#define int ll
#define double long double
const int mod = 1e9 + 7;
const int modd = 998244353;
const int N = 1e5;


signed main()
{

    FAST;
    string s;
    cin >> s;
    if(s[0] == '-' || s.size() < 3) {
        cout << 0;
        return 0;
    }
    for(int i = 0; i < s.size() - 2; i ++) cout << s[i];
    return 0;
}