摘要:
You are given a 0-indexed string array words, where words[i] consists of lowercase English letters. In one operation, select any index i such that 0 < 阅读全文
摘要:
You are given a 0-indexed string blocks of length n, where blocks[i] is either 'W' or 'B', representing the color of the ith block. The characters 'W' 阅读全文
摘要:
There are numBottles water bottles that are initially full of water. You can exchange numExchange empty water bottles from the market with one full wa 阅读全文
摘要:
A spreadsheet is a grid with 26 columns (labeled from 'A' to 'Z') and a given number of rows. Each cell in the spreadsheet can hold an integer value b 阅读全文
摘要:
There is a task management system that allows users to manage their tasks, each associated with a priority. The system should efficiently handle addin 阅读全文
摘要:
There is a malfunctioning keyboard where some letter keys do not work. All other keys on the keyboard work properly. Given a string text of words sepa 阅读全文
摘要:
Given an m x n binary matrix mat, return the number of submatrices that have all ones. Example 1: Input: mat = [[1,0,1],[1,1,0],[1,1,0]] Output: 13 Ex 阅读全文
摘要:
Given an integer array nums, find the maximum possible bitwise OR of a subset of nums and return the number of different non-empty subsets with the ma 阅读全文
摘要:
You are given a 0-indexed integer array nums. An index i is part of a hill in nums if the closest non-equal neighbors of i are smaller than nums[i]. S 阅读全文
摘要:
You are given an array routes representing bus routes where routes[i] is a bus route that the ith bus repeats forever. For example, if routes[0] = [1, 阅读全文
摘要:
A critical point in a linked list is defined as either a local maxima or a local minima. A node is a local maxima if the current node has a value stri 阅读全文
摘要:
You are given an integer array nums. A subsequence sub of nums with length x is called valid if it satisfies: (sub[0] + sub[1]) % 2 == (sub[1] + sub[2 阅读全文
摘要:
A word is considered valid if: It contains a minimum of 3 characters. It contains only digits (0-9), and English letters (uppercase and lowercase). It 阅读全文
摘要:
You are given a 0-indexed integer array players, where players[i] represents the ability of the ith player. You are also given a 0-indexed integer arr 阅读全文
摘要:
Alice is attempting to type a specific string on her computer. However, she tends to be clumsy and may press a key for too long, resulting in a charac 阅读全文
摘要:
You are given a 0-indexed integer array nums and two integers key and k. A k-distant index is an index i of nums for which there exists at least one i 阅读全文
摘要:
A string s can be partitioned into groups of size k using the following procedure: The first group consists of the first k characters of the string, t 阅读全文
摘要:
You are given an integer array nums and an integer k. You may partition nums into one or more subsequences such that each element in nums appears in e 阅读全文
摘要:
You are given an integer num. You know that Bob will sneakily remap one of the 10 possible digits (0 to 9) to another digit. Return the difference bet 阅读全文
摘要:
Given an integer n, return all the numbers in the range [1, n] sorted in lexicographical order. You must write an algorithm that runs in O(n) time and 阅读全文