#include <bits/stdc++.h>

using namespace std;
#define int long long
int32_t main()
{
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    string s;cin>>s;
    if(s[0]=='x')
    {
        cout<<(1LL<<32)-stoi(s.substr(1,s.size()-1));
    }
    else
    {
        cout<<s;
    }
    return 0;
}