yeshen4328的专栏

We have an array A of non-negative integers.For every (contiguous) subarray B = [A[i], A[i+1], ..., A[j]] (with i <= j), we take the bitwise OR of all the elements in B, obtaining a result A[i] |...

题目描述：A full binary tree is a binary tree where each node has exactly 0 or 2 children.Return a list of all possible full binary trees with N nodes.  Each element of the answer is the root node of o...