Compilare: main.cpp: In function 'int dfs(int, int)': main.cpp:13:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp:31:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int verif(int)': main.cpp:35:19: 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:58:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<rez.size(); i++) fout << rez[i] << " "; ~^~~~~~~~~~~ main.cpp:62:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<rez2.size(); i++) fout << rez2[i] << " "; ~^~~~~~~~~~~~