给你一个整数数组 nums 。

You are given an integer array nums. A XOR triplet is defined as the XOR of three elements nums[i] XOR nums[j] XOR nums[k] where i <= j <= k. Return the number of unique XOR triplet values from all possible triplets (i, j, k).   Example 1: Input: nums = [1…

给你一个整数数组 nums。

You are given an integer array nums. Return the length of the longest subsequence in nums whose bitwise XOR is non-zero. If no such subsequence exists, return 0.   Example 1: Input: nums = [1,2,3] Output: 2 Explanation: One longest subsequence is [2, 3].…

如上图所示，电影院的观影厅中有 n 行座位，行编号从 1 到 n ，且每一行内总共有 10 个座位，列编号从 1 到 10 。 给定一个二维数组 reservedSeats ，其中 reservedSeats[i] = [rowi, seati] 表示第 rowi 行的座位 seati 已经被预定。 四人小组必须被安排在同一排的四个座位上。该小组可以坐在以下座位块之一：

A cinema has n rows of seats, numbered from 1 to n. Each row has 10 seats, numbered from 1 to 10. You are given a 2D integer array reservedSeats, where reservedSeats[i] = [rowi, seati] means that seat seati in row rowi is already reserved. A four-person group…

给你一个整数数组 coins 表示不同面额的硬币，另给你一个整数 k 。 你有无限量的每种面额的硬币。但是，你 不能 组合使用不同面额的硬币。 返回使用这些硬币能制造的 第 kth 小 金额。   示例 1： 输入： coins = [3,6,9], k = 3 输出： 9 解释：给定的硬币可以制造以下金额：3元硬币产生3的倍数：3, 6, 9, 12, 15等。6元硬币产生6的倍数：6, 12, 18, 24等。9元硬币产生9的倍数：9, 18, 27, 36等。所有硬币合起来可以产生：3, 6, 9…

You are given an integer array coins representing coins of different denominations and an integer k. You have an infinite number of coins of each denomination. However, you are not allowed to combine coins of different denominations. Return the kth smallest…

给你一个 m x n 的网格图 classroom，其中一个学生志愿者负责清理散布在教室里的垃圾。网格图中的每个单元格是以下字符之一：

You are given an m x n grid classroom where a student volunteer is tasked with cleaning up litter scattered around the room. Each cell in the grid is one of the following:

给你一个下标从 0 开始的整数数组 nums 和一个 正 整数 k 。 你可以对数组执行以下操作 任意次 ：

You are given a 0-indexed integer array nums and a positive integer k. You can do the following operation on the array any number of times: