answer.code:46:1: error: ‘unordered_map’ does not name a type
   46 | unordered_map <ll,int> mph;
      | ^~~~~~~~~~~~~
answer.code: In function ‘void enumTransitions()’:
answer.code:130:27: error: ‘mph’ was not declared in this scope; did you mean ‘mp’?
  130 |                 int cur = mph[rect[i][j].hash];
      |                           ^~~
      |                           mp
answer.code:146:20: error: ‘mph’ was not declared in this scope; did you mean ‘mp’?
  146 |         int orig = mph[rlist[i].hash];
      |                    ^~~
      |                    mp
answer.code: In function ‘int biggest_stadium(int, std::vector<std::vector<int> >)’:
answer.code:259:9: error: ‘mph’ was not declared in this scope; did you mean ‘mp’?
  259 |         mph[rlist[i].hash] = i;
      |         ^~~
      |         mp