train.cpp: In function 'void getreach(int)':
train.cpp:18:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
18 | for(int i=0;i<point_to[v].size();i++)
| ~^~~~~~~~~~~~~~~~~~~
train.cpp:21:43: error: 'class std::queue<int>' has no member named 'push_back'
21 | if(!temp_outdeg[point_to[v][i]]) q.push_back(point_to[v][i]);
| ^~~~~~~~~
train.cpp:30:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
30 | for(int i=0;i<point_to[tt].size();i++)
| ~^~~~~~~~~~~~~~~~~~~~
train.cpp:33:45: error: 'class std::queue<int>' has no member named 'push_back'
33 | if(!temp_outdeg[point_to[tt][i]]) q.push_back(point_to[tt][i]);
| ^~~~~~~~~
train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:60:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
60 | for(int i=0;i<res_graph[fr].size();i++)
| ~^~~~~~~~~~~~~~~~~~~~~