Compilare: main.cpp: In function 'void bfs1()': main.cpp:22:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < L[nod].size(); i++) { ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void bfs2()': main.cpp:41:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < L[nod].size(); i++) { ~~^~~~~~~~~~~~~~~