Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:39:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < nds[node].size(); i++) ^ user.cpp:43:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < nds[i].size(); j++) ^ user.cpp:38:10: warning: unused variable ‘good’ [-Wunused-variable] bool good = true; ^