原创 LeetCode 67. Add Binary
Description Given two binary strings, return their sum (also a binary string). For example, a = "11" b ="1"
2020-02-22 22:11:53
原创 LeetCode 367. Valid Perfect Square
Description Given a positive integer num, write a function which returns True if num is a perfect square else Fal
2020-02-22 22:11:43
原创 LeetCode 485. Max Consecutive Ones
Description Given a binary array, find the maximum number of consecutive 1s in this array. Example: Input: [1,1,0,
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原创 LeetCode 342. Power of Four
Description Given an integer (signed 32 bits), write a function to check whether it is a power of 4. Example: Give
2020-02-22 22:11:43
原创 LeetCode 223. Rectangle Area
Description Find the total area covered by two rectilinear rectangles in a 2D plane. Each rectangle is defined by i
2020-02-22 22:11:43
原创 LeetCode 500. Keyboard Row
Description Given a List of words, return the words that can be typed using letters of alphabet on only one row’s o
2020-02-22 22:11:43
原创 LeetCode 122. Best Time to Buy and Sell Stock II
Description Say you have an array for which the ith element is the price of a given stock on day i . Design an alg
2020-02-22 22:11:43
原创 LeetCode 20. Valid Parentheses
Description Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input s
2020-02-22 22:11:43
原创 LeetCode 492. Construct the Rectangle
Description For a web developer, it is very important to know how to design a web page’s size. So, given a specific
2020-02-22 22:11:43
原创 LeetCode 374. Guess Number Higher or Lower
Description We are playing the Guess Game. The game is as follows: I pick a number from 1 to n. You have to guess
2020-02-22 22:11:43
原创 LeetCode 101. Symmetric Tree
Description Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). Analysis 最直接
2018-09-04 01:18:33
2
原创 LeetCode 14. Longest Common Prefix
Description Write a function to find the longest common prefix string amongst an array of strings. Code class Solution
2018-09-04 01:18:33
原创 LeetCode 643. Maximum Average Subarray I
Description Given an array consisting of n integers, find the contiguous subarray of given length k that has the maximu
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3
原创 LeetCode 100. Same Tree
Description Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered
2018-09-04 01:18:33
原创 LeetCode 73. Set Matrix Zeroes
Description Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place. Follow up: D
2018-09-04 01:18:33