#include "bits/stdc++.h"

#define int long long
using namespace std;
using ll = long long;
using P = pair<ll, ll>;
const ll INF = (1LL << 61);
ll mod = 1000000007;


signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	string S; cin >> S;
	if (S[0] == '-') {
	
		cout << 0 << endl; return 0;
	}
	if (S.size() <= 2) {
		cout << 0 << endl; return 0;
	}
	for (int i = 0; i < S.size() - 2; i++)cout << S[i];
	cout << endl;
	return 0;
}