#include <iostream>
using namespace std;
typedef long long ll;

int main()
{
    string s;
    cin >> s;
    if (s[0] == 'x')
    {
        ll x = 0;
        for (int i = 1; i < (int)s.size(); i++)
        {
            x = x * 10 + s[i] - '0';
        }
        cout << (1ll << 32) - x << endl;
    }
    else
    {
        cout << s << endl;
    }
}