Compilare: main.cpp: In function 'int BFS(int, int, int*, int*, std::vector<std::pair<int, int> >*)': main.cpp:50:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for (int i = 0; i < adjList[x].size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:99:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 99 | for (int i = 0; i < edges.size() && cnt != N - 1; i++) { | ~~^~~~~~~~~~~~~~ main.cpp:108:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 108 | for (int i = 0; i < edgesToAdd.size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int BFS(int, int, int*, int*, std::vector<std::pair<int, int> >*)': main.cpp:41:16: warning: control reaches end of non-void function [-Wreturn-type] 41 | queue<int> queue; | ^~~~~