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RSS订阅原创 300. Longest Increasing Subsequence
Given an integer array nums, return the length of the longest strictly increasing subsequence.A subsequence is a sequence that can be derived from an array by deleting some or no elements without changing the order of the remaining elements. For example,
2021-09-10 14:32:08
120
原创 137. Single Number II
Given an integer array nums whereevery element appears three times except for one, which appears exactly once. Find the single element and return it.You mustimplement a solution with a linear runtime complexity and useonly constantextra space.Examp...
2021-09-03 16:50:10
116
原创 125. Valid Palindrome
Given a string s, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.Example 1:Input: s = "A man, a plan, a canal: Panama"Output: trueExplanation: "amanaplanacanalpanama" is a palindrome.Example 2:I.
2021-05-06 21:13:52
101
原创 17.19. Missing Two LCCI
You are given an array with all the numbers from 1 to N appearing exactly once, except for two number that is missing. How can you find the missing number in O(N) time and O(1) space?You can return ...
2020-04-18 14:28:34
146
原创 54. Spiral Matrix(螺旋矩阵)
Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order.Example 1:Input:[[ 1, 2, 3 ],[ 4, 5, 6 ],[ 7, 8, 9 ]]Output: [1,2,3,6,9,8,7,4,5]...
2020-02-05 12:44:15
204
原创 287 Find the Duplicate Number(寻找重复数)
题目描述Given an array nums containing n + 1 integers where each integer is between 1 and n (inclusive), prove that at least one duplicate number must exist. Assume that there is only one duplicate numb...
2020-02-04 12:18:33
123
原创 40. Combination Sum II
Given a collection of candidate numbers (candidates) and a target number (target), find all unique combinations in candidateswhere the candidate numbers sums to target.Each number in candidatesmay...
2020-02-03 13:38:02
103
原创 1275. Find Winner on a Tic Tac Toe Game(找出井字棋获胜者)
题目描述：Tic-tac-toe is playedbytwo players A and B on a3x3grid.Here are the rules of Tic-Tac-Toe:Players take turns placing characters into empty squares (" ").The first player A always plac...
2020-01-28 19:25:22
633
原创 9. Palindrome Number
题目描述：Determine whether an integer is a palindrome. An integerisapalindrome when itreads the same backward as forward.Example 1:Input: 121Output: trueExample 2:Input: -121Output: fal...
2019-08-26 21:31:45
101
原创 7. Reverse Integer
题目描述Given a 32-bit signed integer, reverse digits of an integer.Example 1: Input: 123 Output: 321Example 2: Input: -123 Output: -321Example 3： ...
2019-08-25 15:47:47
141
idea 怎么去除代码中的下划线
2021-10-08
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