answer.code: In function ‘int main()’:
answer.code:35:62: error: ‘w’ was not declared in this scope
   35 |                                                 sum = (sum + w) % mod;
      |                                                              ^
answer.code:37:66: error: expected primary-expression before ‘)’ token
   37 |                                                 int tmpb = max(C,)
      |                                                                  ^