Compilare: main.cpp: In function 'int bfs()': main.cpp:31:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); i++) { ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:56:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[n].size(); i++) { ~~^~~~~~~~~~~~~