#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main() {
    string s; cin >> s;
    if(s[0] == 'x'){
        cout << (ll)pow(2, 32) - stoll(s.substr(1)) << endl;
    } else {
        cout << stoi(s) << endl;
    }
    return 0;
}