Compilare: main.cpp: In function 'void bfs(int)': main.cpp:18:22: 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:55:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();++i)g<<sol[i]<<" "; ~^~~~~~~~~~~ main.cpp:45:9: warning: unused variable 'nr' [-Wunused-variable] int nr=0; ^~