Is there anyHello codeforces! ↵ ↵ Recently in the problem I came across with this data structure,which can perform this operations:↵ ↵ - add element↵ ↵ - delete element↵ ↵ - return the maximal of it↵ ↵ with O(1) for query.↵ ↵ So the question is simple: is it exist?