Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:60:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[v].size(); ++i) ^ user.cpp: In function ‘int bfs(int)’: user.cpp:87:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<rs[c].size(); ++i) ^ user.cpp:93:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[curr].size(); ++i) ^