#include <bits/stdc++.h> 
using namespace std;
using ll =long long;
#define all(v) v.begin(),v.end()
 #define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)

int main() {
  string S;cin>>S;
  if(S[0]!='x') cout<<S<<endl;
  else {
    string t="";
    for(ll i=1;i<S.size();i++) t+=S[i];
    ll a=stoll(t);
  
    cout<<-1*a+(1LL<<32)<<endl;

  }


}