Compilare: user.cpp: In function ‘void bfs()’: user.cpp:27:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<X[nod].size();i++) ^ user.cpp: In function ‘void dfs(int, int)’: user.cpp:43:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A[nod].size();i++) ^