Compilare: user.cpp: In instantiation of ‘bool Treap<Key, Comparator>::erase(Treap<Key, Comparator>::Node*&, const Key&) [with Key = int; Comparator = std::less<int>]’: user.cpp:330:35: required from ‘bool Treap<Key, Comparator>::erase(const Key&) [with Key = int; Comparator = std::less<int>]’ user.cpp:514:25: required from here user.cpp:276:10: warning: variable ‘value’ set but not used [-Wunused-but-set-variable] bool value; ^ user.cpp: In function ‘int main()’: user.cpp:494:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in", "r", stdin); ^ user.cpp:495:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.out", "w", stdout); ^ user.cpp:501:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:505:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &type, &key); ^