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

#define INF 1234567890
#define ll long long

int main()
{
	ios::sync_with_stdio(0); cin.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	string s;
	cin >> s;
	if (s[0] == 'x')
	{
		ll x = stoll(string(s.begin()+1, s.end()));
		cout << (1LL<<32) - x << "\n";
	}
	else
	{
		ll x = stoll(s);
		cout << x << "\n";
	}
	return 0;
}