Compilare: user.cpp: In function ‘bool bfs()’: user.cpp:55:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[curr].size(); ++i) ^ user.cpp: In function ‘void dfsup(int)’: user.cpp:70:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[x].size(); ++i) ^ user.cpp: In function ‘void dfsdown(int)’: user.cpp:83:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[x].size(); ++i) ^ user.cpp: In function ‘void read()’: user.cpp:115:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[N].size(); ++i) ^ user.cpp:145:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<Edgiz.size(); ++i) ^ user.cpp:151:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<rs.size(); ++i) ^