Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:22:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<v[k].size(); ++i) ^ user.cpp:28:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<HASH[mod].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:6:22: warning: integer overflow in expression [-Woverflow] # define var (1<<31)-1 ^ user.cpp:46:10: note: in expansion of macro ‘var’ Suma=var; HASH[Suma%mil].push_back(Suma); ^