Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:19:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();++i) ^ user.cpp: In function ‘bool gensol(int, int, int)’: user.cpp:48:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size() && !ok;++i) ^ user.cpp:55:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (v[nod][i]==orig && st.size()==a[nr]) ^