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View Compilation Error

0_0_39468676_28614.cpp:74:1: error: 'unordered_map' does not name a type
   74 | unordered_map<ull, int> mp;
      | ^~~~~~~~~~~~~
0_0_39468676_28614.cpp: In function 'void Upd(int, int, int)':
0_0_39468676_28614.cpp:77:9: error: 'mp' was not declared in this scope; did you mean 'MP'?
   77 |         mp[hsh[u]] -= sz[u];
      |         ^~
      |         MP
0_0_39468676_28614.cpp: In function 'void solve()':
0_0_39468676_28614.cpp:120:17: error: 'mp' was not declared in this scope; did you mean 'm'?
  120 |                 mp[hsh[i]] += sz[i];
      |                 ^~
      |                 m
0_0_39468676_28614.cpp:150:9: error: 'mp' was not declared in this scope; did you mean 'm'?
  150 |         mp.clear();
      |         ^~
      |         m


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