Compilare: main.cpp: In function 'int* BFS(int)': main.cpp:28:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:69:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<p.size();i++) ~^~~~~~~~~ main.cpp:79:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<t.size();i++) ~^~~~~~~~~