Compilare: main.cpp: In function 'bool bfs()': main.cpp:23:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i<v[p].size();i++){ ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:45:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[n].size();i++){ ~^~~~~~~~~~~~