whatyouthink

2020年7月13日

摘要： For a non-negative integer X, the array-form of X is an array of its digits in left to right order. For example, if X = 1231, then the array form is [ 阅读全文

posted @ 2020-07-13 23:22 whatyouthink 阅读(92) 评论(0) 推荐(0) 编辑

1018. Binary Prefix Divisible By 5

摘要： Given an array A of 0s and 1s, consider N_i: the i-th subarray from A[0] to A[i] interpreted as a binary number (from most-significant-bit to least-si 阅读全文

posted @ 2020-07-13 21:14 whatyouthink 阅读(108) 评论(0) 推荐(0) 编辑

2020年7月8日

53. Maximum Subarray

摘要： Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. 最大连续子段和，经典动态规阅读全文

posted @ 2020-07-08 19:37 whatyouthink 阅读(95) 评论(0) 推荐(0) 编辑

1010. Pairs of Songs With Total Durations Divisible by 60

摘要： In a list of songs, the i-th song has a duration of time[i] seconds. Return the number of pairs of songs for which their total duration in seconds is 阅读全文

posted @ 2020-07-08 13:53 whatyouthink 阅读(100) 评论(0) 推荐(0) 编辑

2020年7月7日

27. Remove Element

摘要： Given an array nums and a value val, remove all instances of that value in-place and return the new length. Do not allocate extra space for another ar 阅读全文

posted @ 2020-07-07 19:54 whatyouthink 阅读(87) 评论(0) 推荐(0) 编辑

1089. Duplicate Zeros

摘要： Given a fixed length array arr of integers, duplicate each occurrence of zero, shifting the remaining elements to the right. Note that elements beyond 阅读全文

posted @ 2020-07-07 14:50 whatyouthink 阅读(118) 评论(0) 推荐(0) 编辑

119. Pascal's Triangle II

摘要： Given a non-negative index k where k ≤ 33, return the kth index row of the Pascal's triangle. Note that the row index starts from 0. 只额外开O（k）的空间，那就开一个阅读全文

posted @ 2020-07-07 14:10 whatyouthink 阅读(96) 评论(0) 推荐(0) 编辑

830. Positions of Large Groups

摘要： In a string S of lowercase letters, these letters form consecutive groups of the same character. For example, a string like S = "abbxxxxzyy" has the g 阅读全文

posted @ 2020-07-07 13:49 whatyouthink 阅读(78) 评论(0) 推荐(0) 编辑

661. Image Smoother

摘要： Given a 2D integer matrix M representing the gray scale of an image, you need to design a smoother to make the gray scale of each cell becomes the ave 阅读全文

posted @ 2020-07-07 13:38 whatyouthink 阅读(73) 评论(0) 推荐(0) 编辑

2020年7月6日

1275. Find Winner on a Tic Tac Toe Game

摘要： Tic-tac-toe is played by two players A and B on a 3 x 3 grid. Here are the rules of Tic-Tac-Toe: Players take turns placing characters into empty squa 阅读全文

posted @ 2020-07-06 20:19 whatyouthink 阅读(113) 评论(0) 推荐(0) 编辑

公告