#include<iostream>
#include<string>
using namespace std;

int main(void){
    string s;
    cin>>s;
    if(s[0]!='x'){
        cout<<s<<endl;
    }
    else{
        long long int a=stol(s.substr(1,s.size()-1));
        cout<<4294967296-a<<endl;
    }
}