给你一棵二叉搜索树，请你返回一棵 平衡后 的二叉搜索树，新生成的树应该与原来的树有着相同的节点值。如果有多种构造方法，请你返回任意一种。 如果一棵二叉搜索树中，每个节点的两棵子树高度差不超过 1 ，我们就称这棵二叉搜索树是 平衡的 。   示例 1： 输入：root = [1,null,2,null,3,null,4,null,null] 输出：[2,1,3,null,null,null,4] 解释：这不是唯一的正确答案，[3,1,4,null,2,null,null] 也是一个可行的构造方案。 示例 2：…

Given the root of a binary search tree, return a balanced binary search tree with the same node values. If there is more than one answer, return any of them. A binary search tree is balanced if the depth of the two subtrees of every node never differs by…

给你一个整数数组 nums。

You are given an integer array nums. A subarray is called balanced if the number of distinct even numbers in the subarray is equal to the number of distinct odd numbers. Return the length of the longest balanced subarray.   Example 1: Input: nums = [2,5,4…

给你一个整数数组 nums。

You are given an integer array nums. A subarray is called balanced if the number of distinct even numbers in the subarray is equal to the number of distinct odd numbers. Return the length of the longest balanced subarray.   Example 1: Input: nums = [2,5,4…

颠倒给定的 32 位有符号整数的二进制位。   示例 1： 输入：n = 43261596 输出：964176192 解释：

Reverse bits of a given 32 bits signed integer.   Example 1: Input: n = 43261596 Output: 964176192 Explanation:

特殊的二进制字符串 是具有以下两个性质的二进制序列：

Special binary strings are binary strings with the following two properties:

给你一个长度为 n 的整数数组 nums 和一个大小为 q 的二维整数数组 queries，其中 queries[i] = [li, ri, ki, vi]。 对于每个查询，按以下步骤执行操作：

You are given an integer array nums of length n and a 2D integer array queries of size q, where queries[i] = [li, ri, ki, vi]. For each query, you must apply the following operations in order:

给你一个长度为 n 的整数数组 nums 和一个大小为 q 的二维整数数组 queries，其中 queries[i] = [li, ri, ki, vi]。

You are given an integer array nums of length n and a 2D integer array queries of size q, where queries[i] = [li, ri, ki, vi].

给你一个整数数组 nums 和一个整数 target。

You are given an integer array nums and an integer target. Return the number of subarrays of nums in which target is the majority element. The majority element of a subarray is the element that appears strictly more than half of the times in that subarray.…

给你一个整数数组 nums 和一个整数 target。

You are given an integer array nums and an integer target. Return the number of subarrays of nums in which target is the majority element. The majority element of a subarray is the element that appears strictly more than half of the times in that subarray.…

给你一个数组 nums 表示 1 到 n 的一个排列。我们按照元素在 nums 中的顺序依次插入一个初始为空的二叉搜索树（BST）。请你统计将 nums 重新排序后，统计满足如下条件的方案数：重排后得到的二叉搜索树与 nums 原本数字顺序得到的二叉搜索树相同。

Given an array nums that represents a permutation of integers from 1 to n. We are going to construct a binary search tree (BST) by inserting the elements of nums in order into an initially empty BST. Find the number of different ways to reorder nums so that…