Compilare: main.cpp: In function 'void dfs(int)': main.cpp:16:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size (); ++i) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void rez(int)': main.cpp:27:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < fiu[nod].size (); ++i) ~~^~~~~~~~~~~~~~~~~~ main.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < fiu[nod].size (); ++i) ~~^~~~~~~~~~~~~~~~~~ main.cpp:44:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); i += 2) ~~^~~~~~~~~~