#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    string s;
    cin >> s;
    if(s[0]!='x') {
        cout<<s<<endl;
    }
    else{
        auto f = [&](string t) -> ll {
            ll ret = 0;
            for(char tt : t) {
                ret *= 10;
                ret += tt-'0';
            }
            return ret;
        };
        ll n = f(s.substr(1));
        dbg(n);
        cout << (1ll<<32)-n << endl;
    }
    return 0;
}