Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:38:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V[node].size();i++) ^ user.cpp: In function ‘int RMQ(int, int)’: user.cpp:95:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘void DFS3(int, int)’: user.cpp:211:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp:220:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<X[node].size();i++) ^ user.cpp:222:13: warning: unused variable ‘neighb’ [-Wunused-variable] int neighb=X[node][i]; ^ user.cpp:226:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<F[node].size();i++) ^ user.cpp:228:13: warning: unused variable ‘neighb’ [-Wunused-variable] int neighb=F[node][i].first; ^ user.cpp:235:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<X2[node].size();i++) ^ user.cpp:240:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<F2[node].size();i++) ^