Compilare: main.cpp: In function 'std::vector<int> bfs(std::vector<int>)': main.cpp:16:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for (int i = 0; i < start.size(); i++) { | ~~^~~~~~~~~~~~~~ main.cpp:25:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int i = 0; i < edges[node].size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~~