Compilare: user.cpp: In function ‘void Comp(const int&, const int&)’: user.cpp:30:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < v.size(); i++) ^ user.cpp: In function ‘void DF(int, int, int)’: user.cpp:37:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a[nod].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:62:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size(); i++) { ^ user.cpp:63:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < sol[i].size(); j++) ^