func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     int a = -2147483647, b = 0;     for (int i = 0; i < n - 1; ++i) {       int x;       cin >> x;       a = max(a, x);     }     cin >> b;     a = max(a, b);     cout << (int)(a ^ b);   }   