Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:32:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[node].size(); i++) ^ user.cpp:42:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[node].size(); i++) ^ user.cpp:58:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^