Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:54:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[v].size(); ++i) ^ user.cpp: In function ‘void read()’: user.cpp:94:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<G[i].size(); ++j) ^ user.cpp:113:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<rsout.size(); ++i) ^ user.cpp:120:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<rsin.size(); ++i) ^ user.cpp:127:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<max(rsout.size(), rsin.size()); ++i) ^