Compilare: main.cpp: In function 'std::vector<int> bfs(int)': main.cpp:28:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:68:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol3.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:70:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol3.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:74:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol4.size(); i++) ~~^~~~~~~~~~~~~