Compilare: main.cpp: In member function 'bool Graph::bfs()': main.cpp:43:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for (int i = 0; i < adj[curr].size(); ++i) { | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In member function 'std::vector<std::pair<int, int> > Graph::get_ans()': main.cpp:73:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for (int i = 0; i < adj[dest].size(); ++i) { | ~~^~~~~~~~~~~~~~~~~~