#include "bits/stdc++.h"
using namespace std;

#ifdef LOCAL
#include "header/debug.h"
#else
#define debug(x...) 42
#endif

#define int long long
using ll = long long;

void solve () {
   string s;
   cin >> s;
   if ( s[0] == 'x'){

      ll ans = stoll(s.substr(1));

      cout << (ll)((1LL<<32) -(ll)(ans)) << endl;
   }
   else{
     cout << s << endl;
   }

}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(0);
    int tt = 1;
    // cin >> tt;
    while (tt--) {
        solve();
    }
}