func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, x, maxi;   string s =  ABRACADABRA ;   int main() {     cin >> n;     maxi = 0;     while (n--) {       cin >> x;       maxi = max(maxi, x);     }     cout << (maxi ^ x) << endl;     return 0;   }   