Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:46:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V[node].size();i++) ^ user.cpp: In function ‘void DFS3(int, int)’: user.cpp:183:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp:192:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<X[node].size();i++) ^ user.cpp:194:13: warning: unused variable ‘neighb’ [-Wunused-variable] int neighb=X[node][i]; ^ user.cpp:198:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<F[node].size();i++) ^ user.cpp:200:13: warning: unused variable ‘neighb’ [-Wunused-variable] int neighb=F[node][i].first; ^ user.cpp:207:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<X2[node].size();i++) ^ user.cpp:212:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<F2[node].size();i++) ^