Compilare: main.cpp: In function 'int bfs()': main.cpp:23:27: 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:61:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < L[d].size(); i++) { ~~^~~~~~~~~~~~~