#include <algorithm>
#include <bits/stdc++.h>
        
using namespace std;
using ll=long long;
 
bool chmin(int& a, int b){ if(a > b){ a = b; return 1; } return 0; }
bool chmax(int& a, int b){ if(a < b){ a = b; return 1; } return 0; }
constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); }
const ll MOD = 1000000007LL;

int main() {
    string N; 
    cin >> N;
    string ans = "0";
    if (N[0] != '-') ans = N.substr(0, N.size()-2);
    cout << ans << endl; 
    return 0;
}