View Compilation Error

0_0_38687993_13272.cpp: In function 'int main()':
0_0_38687993_13272.cpp:50:42: error: 'pub' was not declared in this scope
   50 |                                 res+=fun(pub,u);
      |                                          ^~~
0_0_38687993_13272.cpp:52:42: error: 'pub' was not declared in this scope
   52 |                                 res+=fun(pub,v);
      |                                          ^~~