#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
using namespace std;
int main() {
	int cnt=0;
	string n,m;
	cin >> n;
	if (n[0] == '-' or n.length()<3) cout << 0 << endl;
	else {
		m = n.erase(n.length() - 2);
		cout << m << endl;
	}
		
	
	return 0;
}