Compilare: user.cpp: In function ‘int main()’: user.cpp:20:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i <= n; ++i) { ^ user.cpp:33:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (dif < k && H.size()) { ^ user.cpp:19:9: warning: variable ‘rep’ set but not used [-Wunused-but-set-variable] int rep, st = n + 1; ^ user.cpp:19:14: warning: variable ‘st’ set but not used [-Wunused-but-set-variable] int rep, st = n + 1; ^