Compilare: user.cpp: In member function ‘int SequenceCounter::LowestIndexWithValue(int) const’: user.cpp:72:60: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (0 <= next_index && next_index < num_primes_.size() && num_primes_[next_index] >= value) { ^ user.cpp: In member function ‘int SequenceCounter::LargestIndexWithValue(int) const’: user.cpp:84:60: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (0 <= next_index && next_index < num_primes_.size() && num_primes_[next_index] <= value) { ^ user.cpp: In member function ‘void SequenceCounter::LoadConfiguration()’: user.cpp:17:51: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &num_elements, &desired_primes_); ^ user.cpp:21:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &element); ^