Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:32:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp:37:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp:42:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int dist=1;dist<=G[node].size()-1;dist++) ^ user.cpp:43:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i+dist<G[node].size();i++) ^ user.cpp:54:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<GG[node].size();i++) ^ user.cpp:59:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int dist=1;dist<=GG[node].size()-1;dist++) ^ user.cpp:60:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i+dist<GG[node].size();i++) ^ user.cpp:52:9: warning: unused variable ‘INF’ [-Wunused-variable] int INF=0x3f3f3f3f; ^