Compilare: main.cpp: In function 'int bfs()': main.cpp:20:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<L[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void bfs_verif(int, int)': main.cpp:43:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<L[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<L[n].size(); i++) ~^~~~~~~~~~~~