#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef string str;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    str s;
    cin >> s;
    cout << fixed << setprecision(0);
    if (s[0] == 'x')
    {
        s.erase(0, 1);
        ll p = stol(s);
        cout << pow(2, 32) - p;
    }
    else cout << s;
    return 0;
}