View Compilation Error

0_0_38505933_20192.cpp: In function 'void init()':
0_0_38505933_20192.cpp:21:57: error: request for member 'clear' in 'mp.std::map<_Key, _Tp, _Compare, _Alloc>::operator[]<long long int, long long int, std::less<long long int>, std::allocator<std::pair<const long long int, long long int> > >((*(const key_type*)(& i)))', which is of non-class type 'std::map<long long int, long long int>::mapped_type {aka long long int}'
  for(i=0; i<=28; ++i) v[i].clear(), f[i].clear(), mp[i].clear(); 
                                                         ^