随笔分类 - leetcode
摘要：Can Place Flowers You have a long flowerbed in which some of the plots are planted, and some are not. However, flowers cannot be planted in adjacent p
阅读全文
摘要：LongestContinuous Increasing Subsequence Given an unsorted array of integers nums, return the length of the longest continuous increasing subsequence
阅读全文
摘要：Baseball Game You are keeping the scores for a baseball game with strange rules. At the beginning of the game, you start with an empty record. You are
阅读全文
摘要：Excel Sheet Column Number Given a string columnTitle that represents the column title as appears in an Excel sheet, return its corresponding column nu
阅读全文
摘要：Implement Stack using Queues Implement a last-in-first-out (LIFO) stack using only two queues. The implemented stack should support all the functions
阅读全文
摘要：Palindrome Linked List Given the head of a singly linked list, return true if it is a palindrome or false otherwise. Example 1: Input: head = [1,2,2,1
阅读全文
摘要：Max Consecutive Ones Given a binary array nums, return the maximum number of consecutive 1's in the array. Example 1: Input: nums = [1,1,0,1,1,1] Outp
阅读全文
摘要：Number of Segments in a String Given a string s, return the number of segments in the string. A segment is defined to be a contiguous sequence of non-
阅读全文
摘要：Next Greater Element I The next greater element of some element x in an array is the first greater element that is to the right of x in the same array
阅读全文
摘要：Longest Uncommon Subsequence I Given two strings a and b, return the length of the longest uncommon subsequence between a and b. If the longest uncomm
阅读全文
摘要：Student Attendance Record I You are given a string s representing an attendance record for a student where each character signifies whether the studen
阅读全文
摘要：Longest Palindrome Given a string s which consists of lowercase or uppercase letters, return the length of the longest palindrome that can be built wi
阅读全文
摘要：Reverse Vowels of a String Given a string s, reverse only all the vowels in the string and return it. The vowels are 'a', 'e', 'i', 'o', and 'u', and
阅读全文
摘要：Maximum Average Subarray I You are given an integer array nums consisting of n elements, and an integer k. Find a contiguous subarray whose length is
阅读全文
摘要：Binary Tree Tilt Given the root of a binary tree, return the sum of every tree node's tilt. The tilt of a tree node is the absolute difference between
阅读全文
摘要：Intersection of Two Arrays Given two integer arrays nums1 and nums2, return an array of their intersection. Each element in the result must be unique
阅读全文
摘要：Intersection of Two Arrays II Given two integer arrays nums1 and nums2, return an array of their intersection. Each element in the result must appear
阅读全文
摘要：Valid Perfect Square Given a positive integer num, return true if num is a perfect square or false otherwise. A perfect square is an integer that is t
阅读全文
摘要：First Unique Character in a String Given a string s, find the first non-repeating character in it and return its index. If it does not exist, return -
阅读全文
摘要：Third Maximum Number Given an integer array nums, return the third distinct maximum number in this array. If the third maximum does not exist, return
阅读全文
浙公网安备 33010602011771号