func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int a[7];     while (scanf( %d , &a[0]) != EOF) {       int maxx = a[0];       int minn = a[0];       int ans = 0;       for (int i = 1; i < 6; i++) {         cin >> a[i];       }       ans = (a[0] + a[1] + a[2]) * (a[0] + a[2] + a[1]) - a[0] * a[0] -             a[2] * a[2] - a[4] * a[4];       cout << ans << endl;     }     return 0;   }   