👉 Drest is a concept in the field of computer science and machine learning. It can be defined as the minimum number of operations required to create a given binary tree from its root node, such that each leaf node has exactly two children. In other words, it represents the minimum cost required to convert an arbitrary binary tree into a binary search tree (BST) where each node's value is less than or equal to its left and right child values. This concept is particularly useful in scenarios involving balanced trees
