sqyx008-CSDN博客

原创 LeetCode 643. Maximum Average Subarray I

Given an array consisting of n integers, find the contiguous subarray of given length k that has the maximum average value. And you need to output the maximum average value.

2017-07-21 19:38:34 663

原创 LeetCode 55. Jump Game

Given an array of non-negative integers, you are initially positioned at the first index of the array.Each element in the array represents your maximum jump length at that position.

2017-07-18 20:39:03 453

原创 LeetCode 633. Sum of Square Numbers

Given a non-negative integer c, your task is to decide whether there’re two integers a and b such that a2+b2=ca^2 + b^2 = c.

2017-07-15 10:28:01 340

原创 LeetCode 338. Counting Bits

Given a non negative integer number num. For every numbers i in the range 0 ≤ i ≤ num calculate the number of 1's in their binary representation and return them as an array.

2017-04-28 15:17:23 332

原创 LeetCode 345. Reverse Vowels of a String

Write a function that takes a string as input and reverse only the vowels of a string.

2017-04-27 12:45:20 505

原创 LeetCode 561. Array Partition I

Given an array of 2n integers, your task is to group these integers into n pairs of integer, say (a1, b1), (a2, b2), …, (an, bn) which makes sum of min(ai, bi) for all i from 1 to n as large as possible.

2017-04-26 08:35:29 690

原创 LeetCode 258. Add Digits

Given a non-negative integer num, repeatedly add all its digits until the result has only one digit.

2017-04-23 15:53:11 460

原创 LeetCode 100. Same Tree

Given two binary trees, write a function to check if they are equal or not.Two binary trees are considered equal if they are structurally identical and the nodes have the same value.

2017-04-23 10:42:33 328

原创 LeetCode 217. Contains Duplicate

Given an array of integers, find if the array contains any duplicates.

2017-04-22 12:00:18 267

原创 LeetCode 283. Move Zeroes

Given an array nums, write a function to move all 0’s to the end of it while maintaining the relative order of the non-zero elements.

2017-04-22 11:34:50 267

原创 LeetCode 73. Set Matrix Zeroes

Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.

2017-04-22 11:27:02 270

原创 LeetCode 35. Search Insert Position

Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order.

2017-04-17 23:52:00 374

原创 LeetCode 14. Longest Common Prefix

Write a function to find the longest common prefix string amongst an array of strings.

2017-04-17 23:28:20 378

原创 LeetCode 551. Student Attendance Record I

DescriptionYou are given a string representing an attendance record for a student. The record only contains the following three characters:‘A’ : Absent.‘L’ : Late.‘P’ : Present.A student could be r

2017-04-17 17:11:21 577

原创 LeetCode 521. Longest Uncommon Subsequence I

Given a group of two strings, you need to find the longest uncommon subsequence of this group of two strings.

2017-04-16 10:54:55 467

原创 LeetCode 556. Next Greater Element III

Given a positive 32-bit integer n, you need to find the smallest 32-bit integer which has exactly the same digits existing in the integer n and is greater in value than n.

2017-04-10 15:55:07 820

原创 LeetCode 482. License Key Formatting

Now you are given a string S, which represents a software license key which we would like to format. The string S is composed of alphanumerical characters and dashes.

2017-04-10 08:54:12 1360

原创 LeetCode 228. Summary Ranges

Given a sorted integer array without duplicates, return the summary of its ranges.

2017-04-09 13:56:07 285

原创 LeetCode 66. Plus One

DescriptionGiven a non-negative integer represented as a non-empty array of digits, plus one to the integer.You may assume the integer do not contain any leading zero, except the number 0 itself.The di

2017-04-08 08:52:26 249

原创 LeetCode 101. Symmetric Tree

Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center).

2017-04-07 12:48:48 239

原创 LeetCode 485. Max Consecutive Ones

Given a binary array, find the maximum number of consecutive 1s in this array.

2017-04-07 09:21:08 203

原创 LeetCode 342. Power of Four

Given an integer (signed 32 bits), write a function to check whether it is a power of 4.

2017-04-06 22:46:29 206

原创 LeetCode 396. Rotate Function

Given an array of integers A and let n to be its length. Assume Bk to be an array obtained by rotating the array A k positions clock-wise

2017-04-05 20:20:50 245

原创 LeetCode 191. Number of 1 Bits

Write a function that takes an unsigned integer and returns the number of'1'bits it has (also known as the Hamming weight).

2017-04-05 19:13:23 234

原创 LeetCode 189. Rotate Array

Rotate an array of n elements to the right by k steps.

2017-04-04 11:07:20 252

原创 LeetCode 263. Ugly Number

Write a program to check whether a given number is an ugly number.Ugly numbers are positive numbers whose prime factors only include 2, 3, 5.

2017-04-04 09:23:50 223

原创 LeetCode 367. Valid Perfect Square

Given a positive integer num, write a function which returns True if num is a perfect square else False.

2017-04-04 09:08:23 281

原创 LeetCode 374. Guess Number Higher or Lower

We are playing the Guess Game. The game is as follows: I pick a number from 1 to n. You have to guess which number I picked.

2017-04-04 08:45:18 252

原创 LeetCode 383. Ransom Note

Given an arbitrary ransom note string and another string containing letters from all the magazines, write a function that will return true if the ransom note can be constructed from the magazines.

2017-04-04 08:16:11 333

原创 LeetCode 434. Number of Segments in a String

Count the number of segments in a string, where a segment is defined to be a contiguous sequence of non-space characters.

2017-04-04 08:08:11 236

原创 LeetCode 20. Valid Parentheses

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.

2017-04-03 22:35:24 192

原创 LeetCode 67. Add Binary

Given two binary strings, return their sum (also a binary string).

2017-04-03 22:02:25 198

原创 LeetCode 541. Reverse String II

Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from the start of the string.

2017-04-03 09:58:38 239

原创 LeetCode 122. Best Time to Buy and Sell Stock II

Say you have an array for which the ithi^{th} element is the price of a given stock on day ii.Design an algorithm to find the maximum profit. You may complete as many transactions as you like

2017-04-03 00:10:31 211

原创 LeetCode 7. Reverse Integer

Reverse digits of an integer.

2017-04-02 22:29:31 184

原创 LeetCode 492. Construct the Rectangle

For a web developer, it is very important to know how to design a web page’s size.

2017-04-02 17:40:55 285

原创 LeetCode 500. Keyboard Row

Given a List of words, return the words that can be typed using letters of alphabet on only one row’s of American keyboard like the image below.

2017-04-02 17:07:04 169

原创 LeetCode 463. Island Perimeter

You are given a map in form of a two-dimensional integer grid where 1 represents land and 0 represents water. Grid cells are connected horizontally/vertically (not diagonally).

2017-04-01 19:06:24 176

原创 LeetCode 344. Reverse String

Write a function that takes a string as input and returns the string reversed.

2017-04-01 09:53:32 180

原创 LeetCode 223. Rectangle Area

Find the total area covered by two rectilinear rectangles in a 2D plane.Each rectangle is defined by its bottom left corner and top right corner as shown in the figure.

2017-03-30 11:39:02 186

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