Compilare: user.cpp: In function ‘void DF(int, int)’: user.cpp:30:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < v[nod].size(); i++) ^ user.cpp:32:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < v[nod].size() - 1) ^ user.cpp:35:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = start; i < v[nod].size(); i++) { ^ user.cpp: In function ‘void DFDin(int)’: user.cpp:52:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); i++) { ^