Compilare: user.cpp: In function ‘void Dfs(int)’: user.cpp:18:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[Nod].size(); ++i){ ^ user.cpp:21:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < Sol.size(); ++j) ^ user.cpp:26:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < Sol2.size(); ++j) ^