View Compilation Error

0_0_18243736_19373.cpp: In function 'int bfs(int)':
0_0_18243736_19373.cpp:39:20: error: no match for 'operator[]' (operand types are 'std::set<int> [200005]' and 'std::pair<int, int>')
             if (!mp[t].count(*it))
                    ^
0_0_18243736_19373.cpp:47:29: error: 'v' was not declared in this scope
             for (int i=0; i<v.size(); i++)
                             ^