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全部文章（共118篇）

27 Hamming Distance

关注每天一道编程题专栏，一起学习进步。题目 The Hamming distance between two integers is the number of positions at which the corresponding bits are different. Give...

2020-02-19

0 512

26 Unique Number of Occurrences

关注每天一道编程题专栏，一起学习进步。题目 Given an array of integers arr, write a function that returns true if and only if the number of occurrences of each value...

2020-02-19

0 637

25 Squares of a Sorted Array

关注每天一道编程题专栏，一起学习进步。题目 Given an array of integers A sorted in non-decreasing order, return an array of the squares of each number, also in sorte...

2020-02-17

0 495

24 Merge Two Binary Trees

关注每天一道编程题专栏，一起学习进步。题目 Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two trees are over...

2020-02-15

0 530

23 Robot Return to Origin

关注每天一道编程题专栏，一起学习进步。题目 There is a robot starting at position (0, 0), the origin, on a 2D plane. Given a sequence of its moves, judge if this rob...

2020-02-14

0 460

22 Self Dividing Numbers

关注每天一道编程题专栏，一起学习进步。题目 A self-dividing number is a number that is divisible by every digit it contains. For example, 128 is a self-dividing num...

2020-02-13

0 385

21 N-Repeated Element in Size 2N Array

关注每天一道编程题专栏，一起学习进步。题目 In a array A of size 2N, there are N+1 unique elements, and exactly one of these elements is repeated N times. Return th...

2020-02-11

0 503

20 Sort Array By Parity

关注每天一道编程题专栏，一起学习进步。题目 Given an array A of non-negative integers, return an array consisting of all the even elements of A, followed by all the ...

2020-02-10

0 459

19 Flipping an Image

关注每天一道编程题专栏，一起学习进步。题目 Given a binary matrix A, we want to flip the image horizontally, then invert it, and return the resulting image. To flip...

2020-02-09

0 556

18 Replace Elements with Greatest Element on Right Side

关注每天一道编程题专栏，一起学习进步。题目 Given an array arr, replace every element in that array with the greatest element among the elements to its right, and re...

2020-02-08

0 530