Compilare: main.cpp: In function 'void bfs(arbore)': main.cpp:29:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for (int i = 0; i < a[curent.a].size(); ++i) { | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:62:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for (int j = 0; j < pasi[i].size(); ++j) | ~~^~~~~~~~~~~~~~~~