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

typedef modint998244353 mint;
typedef long long ll;

int main(){
	string s; cin >> s;
	if (s[0] == '-') cout << 0 << endl;
	else if (s.size() < 3) cout << 0 << endl;
	else{
		string t = "";
		for (int i=0; i<s.size()-2; i++){
			t += s[i];
		}
		cout << t << endl;
	}
}