//#include <bits/stdc++.h>>
#include <iostream>
#include <cmath>
#include <string>
#include <algorithm>
#include <set>
#include <vector>
#include <map>
#include <list>
#include <stack>
#include <bitset>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <queue>
#define pt(sth) cout << sth << "\n"
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;
typedef long long ll;
typedef pair<ll, ll> pll;
template<class T>bool chmax(T &a, const T &b) {if(a<b) {a=b; return 1;} return 0;}
template<class T>bool chmin(T &a, const T &b) {if(b<a) {a=b; return 1;} return 0;}
static const ll INF=1e18;
static const ll MAX=101010;
static const ll MOD=1e9+7;
//static const ll MOD=998244353;
//for(i=0;i<N;i++) cin>>a[i];

typedef vector<vector<vector<ll>>> v3D;
typedef vector<vector<ll>> v2D;
typedef vector<ll> v1D;





int main(void) {
  ll i, j, k;
  
  string s;cin>>s;
  if(s[0]=='-'){
    pt(0);
    return 0;
  }else{
    if(s.size()<=2){
      pt(0);
    }else{
      pt(s.substr(0,(ll)s.size()-2));
    }
    
    
  }
  
  
  
}