#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll two32 = 4294967296;

int main(){
    string S; cin >> S;
    if(S[0] == 'x'){
        ll n = stoi(S.substr(1, S.size()));
        cout << two32 - n << endl;
    }
    else cout << S << endl;
}