View Compilation Error

0_0_28247352_26956.cpp:33:6: error: 'hash_map' in namespace 'std' does not name a template type
 std::hash_map<LL, LL> mp, emp;
      ^
0_0_28247352_26956.cpp: In function 'LL solve()':
0_0_28247352_26956.cpp:66:2: error: 'mp' was not declared in this scope
  mp = emp;
  ^
0_0_28247352_26956.cpp:66:7: error: 'emp' was not declared in this scope
  mp = emp;
       ^