璨璨要好好学习

2017年1月22日

摘要： Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Not 阅读全文

posted @ 2017-01-22 11:20 璨璨要好好学习阅读(99) 评论(0) 推荐(0) 编辑

Factorial Trailing Zeroes Leetcode

摘要： Given an integer n, return the number of trailing zeroes in n!. Note: Your solution should be in logarithmic time complexity. 这道题首先要读懂题目。。。一开始连factori 阅读全文

posted @ 2017-01-22 05:09 璨璨要好好学习阅读(118) 评论(0) 推荐(0) 编辑

2017年1月21日

Longest Common Prefix Leetcode

摘要： Write a function to find the longest common prefix string amongst an array of strings. 这道题利用stringbuffer的delete方法 topsolution是用substring的还可以用Arrays.s 阅读全文

posted @ 2017-01-21 03:06 璨璨要好好学习阅读(106) 评论(0) 推荐(0) 编辑

2017年1月20日

Reverse Integer Leetcode

摘要： Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 这道题要考虑反转之后overflow的问题，感觉我的写法很非主流啊。还是用主流写法又写了一下阅读全文

posted @ 2017-01-20 08:58 璨璨要好好学习阅读(98) 评论(0) 推荐(0) 编辑

2017年1月19日

Linked List Cycle Leetcode

摘要： Given a linked list, determine if it has a cycle in it. Follow up:Can you solve it without using extra space? 这道题很简单也很经典感觉。一开始用hashset做的，但这样就用了extra s 阅读全文

posted @ 2017-01-19 11:13 璨璨要好好学习阅读(111) 评论(0) 推荐(0) 编辑

Remove Element Leetcode

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

posted @ 2017-01-19 10:48 璨璨要好好学习阅读(135) 评论(0) 推荐(0) 编辑

Reverse Vowels of a String Leetcode

摘要： Write a function that takes a string as input and reverse only the vowels of a string. Example 1:Given s = "hello", return "holle". Example 2:Given s 阅读全文

posted @ 2017-01-19 08:18 璨璨要好好学习阅读(136) 评论(0) 推荐(0) 编辑

Number of Segments in a String Leetcode

摘要： Count the number of segments in a string, where a segment is defined to be a contiguous sequence of non-space characters. Please note that the string 阅读全文

posted @ 2017-01-19 06:04 璨璨要好好学习阅读(155) 评论(0) 推荐(0) 编辑

Best Time to Buy and Sell Stock Leetcode

摘要： Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transaction 阅读全文

posted @ 2017-01-19 00:07 璨璨要好好学习阅读(124) 评论(0) 推荐(0) 编辑

2017年1月18日

Happy Number Leetcode

摘要： 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 intege 阅读全文

posted @ 2017-01-18 12:08 璨璨要好好学习阅读(167) 评论(0) 推荐(0) 编辑

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