func_code_string: #include <bits/stdc++.h>   using namespace std;   template <typename T>   void print(vector<T> v) {     for (T e : v) {       cout << e <<    ;     }     cout << endl;   }   template <typename T>   void print(vector<vector<T>> v) {     int n = v.size();     for (int i = 0; i < n; i++) {       cout << i <<  :  ;       for (T e : v[i]) {         cout << e <<    ;       }       cout << endl;     }   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     vector<int> a(6);     for (int i = 0; i < 6; i++) {       cin >> a[i];     }     cout << (int)(pow(a[0] + a[1] + a[2], 2) - a[0] * a[0] - a[2] * a[2] -                   a[4] * a[4])          << endl;   }   