View Compilation Error

0_0_33573630_19792.cpp: In function 'void solve()':
0_0_33573630_19792.cpp:45:34: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type' has no member named 'a'
         if (mp[make_pair(frot[i].a, frot[i].p)] == 1) 
                                  ^
0_0_33573630_19792.cpp:45:45: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type' has no member named 'p'
         if (mp[make_pair(frot[i].a, frot[i].p)] == 1) 
                                             ^