Compilare: user.cpp: In function ‘int DFS(int)’: user.cpp:33:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[nod].size(); ++i) ^ user.cpp: In function ‘int Depth(int)’: user.cpp:46:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[nod].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:59:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<v[i].size(); ++j) ^