随笔分类 -  leetcode-easy

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记录leetcode的刷题之旅，从easy开始
[leetcode]292.Nim Game
摘要：题目 You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 s 阅读全文
posted @ 2018-10-17 09:36 shinjia 阅读(108) 评论(0) 推荐(0)
[leetcode]290.Word Pattern
摘要：题目 Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijection between a le 阅读全文
posted @ 2018-10-17 09:32 shinjia 阅读(94) 评论(0) 推荐(0)
[leetcode]283.Move Zeroes
摘要：题目 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. Example: Inpu 阅读全文
posted @ 2018-10-17 09:29 shinjia 阅读(84) 评论(0) 推荐(0)
[leetcode]278.First Bad Version
摘要：题目 You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the qualit 阅读全文
posted @ 2018-10-17 09:24 shinjia 阅读(94) 评论(0) 推荐(0)
[leetcode]268.Missing Number
摘要：题目 Given an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing from the array. Example 1: Input: [3,0,1] Out 阅读全文
posted @ 2018-10-15 10:59 shinjia 阅读(89) 评论(0) 推荐(0)
[leetcode]257.Binary Tree Paths
摘要：题目 Given a binary tree, return all root to leaf paths. Note: A leaf is a node with no children. Example: Input: 1 / \ 2 3 \ 5 Output: ["1 2 5", "1 3"] 阅读全文
posted @ 2018-10-15 10:14 shinjia 阅读(155) 评论(0) 推荐(0)
[leetcode]263.Ugly Number
摘要：题目 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. Exam 阅读全文
posted @ 2018-10-15 09:00 shinjia 阅读(77) 评论(0) 推荐(0)
[leetcode]258.Add Digits
摘要：题目 Given a non negative integer num, repeatedly add all its digits until the result has only one digit. Example: Input: 38 Output: 2 Explanation: The 阅读全文
posted @ 2018-10-15 08:40 shinjia 阅读(91) 评论(0) 推荐(0)
[leetcode]237.Delete Node in a Linked List
摘要：题目 Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Given linked list head = [4,5,1,9], wh 阅读全文
posted @ 2018-10-14 11:20 shinjia 阅读(101) 评论(0) 推荐(0)
[leetcode]231.Power of Two
摘要：题目 Given an integer, write a function to determine if it is a power of two. Example 1: Input: 1 Output: true Explanation: 20 = 1 Example 2: Input: 16 阅读全文
posted @ 2018-10-14 11:06 shinjia 阅读(106) 评论(0) 推荐(0)
[leetcode]226.Invert Binary Tree
摘要：题目 Invert a binary tree. 比如原来的树为 0 1 2 逆转后的树为 0 2 1 也就是把所有结点的左右结点互换 解法一 思路 递归 代码 解法二 思路 非递归，用树的层次遍历 代码 阅读全文
posted @ 2018-10-14 10:36 shinjia 阅读(83) 评论(0) 推荐(0)
[leetcode]219.Contains Duplicate II
摘要：题目 Given an array of integers and an integer k, find out whether there are two distinct indices i and j in the array such that nums[i] = nums[j] and t 阅读全文
posted @ 2018-10-14 10:06 shinjia 阅读(85) 评论(0) 推荐(0)
[leetcode]217.Contains Duplicate
摘要：题目 Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the 阅读全文
posted @ 2018-10-14 09:38 shinjia 阅读(92) 评论(0) 推荐(0)
[leetcode]206.Reverse Linked List
摘要：题目 Reverse a singly linked list. Example: Input: 1 2 3 4 5 NULL Output: 5 4 3 2 1 NULL Follow up: A linked list can be reversed either iteratively or 阅读全文
posted @ 2018-10-14 09:11 shinjia 阅读(78) 评论(0) 推荐(0)
[leetcode]204.Count Primes
摘要：题目 Count the number of prime numbers less than a non negative number, n. Example: Input: 10 Output: 4 Explanation: There are 4 prime numbers less than 阅读全文
posted @ 2018-10-12 11:59 shinjia 阅读(90) 评论(0) 推荐(0)
[leetcode]203.Remove Linked List Elements
摘要：题目 Remove all elements from a linked list of integers that have value val. Example: Input: 1 2 6 3 4 5 6, val = 6 Output: 1 2 3 4 5 解法 思路 思路不难。。。就是很繁琐 阅读全文
posted @ 2018-10-12 10:16 shinjia 阅读(116) 评论(0) 推荐(0)
[leetcode]202.Happy Number
摘要：题目 Write an algorithm to determine if a number is "happy". A happy number is a number defined by the following process: Starting with any positive int 阅读全文
posted @ 2018-10-12 09:26 shinjia 阅读(126) 评论(0) 推荐(0)
[leetcode]198.House Robber
摘要：题目 You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stopping 阅读全文
posted @ 2018-10-12 08:27 shinjia 阅读(148) 评论(0) 推荐(0)
[leetcode]191.Number of 1 Bits
摘要：题目 Write a function that takes an unsigned integer and returns the number of '1' bits it has (also known as the Hamming weight). Example: Input: 11 Ou 阅读全文
posted @ 2018-10-11 11:08 shinjia 阅读(102) 评论(0) 推荐(0)
[leetcode]190.Reverse Bits
摘要：题目 Reverse bits of a given 32 bits unsigned integer. Example: Input: 43261596 Output: 964176192 Explanation: 43261596 represented in binary as 0000001 阅读全文
posted @ 2018-10-11 10:57 shinjia 阅读(88) 评论(0) 推荐(0)

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