北叶青藤

2016年7月28日

摘要： Design an algorithm to encode a list of strings to a string. The encoded string is then sent over the network and is decoded back to the original list 阅读全文

posted @ 2016-07-28 06:43 北叶青藤阅读(236) 评论(0) 推荐(0)

273. Integer to English Words

摘要： Convert a non-negative integer to its english words representation. Given input is guaranteed to be less than 231 - 1. For example, 123 -> "One Hundre 阅读全文

posted @ 2016-07-28 05:27 北叶青藤阅读(243) 评论(0) 推荐(0)

2016年7月27日

348. Design Tic-Tac-Toe

摘要： Design a Tic-tac-toe game that is played between two players on a n x n grid. You may assume the following rules: A move is guaranteed to be valid and 阅读全文

posted @ 2016-07-27 21:01 北叶青藤阅读(182) 评论(0) 推荐(0)

Maximum Gap

摘要： Given an unsorted array, find the maximum difference between the successive elements in its sorted form. Return 0 if the array contains less than 2 el 阅读全文

posted @ 2016-07-27 11:13 北叶青藤阅读(195) 评论(0) 推荐(0)

Coin Change

摘要： You are given coins of different denominations and a total amount of money amount. Write a function to compute the fewest number of coins that you nee 阅读全文

posted @ 2016-07-27 05:49 北叶青藤阅读(222) 评论(0) 推荐(0)

347. Top K Frequent Elements

摘要： Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. 分析： http://blog.csd 阅读全文

posted @ 2016-07-27 01:24 北叶青藤阅读(218) 评论(0) 推荐(0)

2016年7月26日

Android Unlock Patterns

摘要： Given an Android 3x3 key lock screen and two integers m and n, where 1 ≤ m ≤ n ≤ 9, count the total number of unlock patterns of the Android lock scre 阅读全文

posted @ 2016-07-26 23:43 北叶青藤阅读(327) 评论(0) 推荐(0)

Count Numbers with Unique Digits

摘要： Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n. Example:Given n = 2, return 91. (The answer should be the 阅读全文

posted @ 2016-07-26 12:38 北叶青藤阅读(175) 评论(0) 推荐(0)

Valid Perfect Square

摘要： Given a positive integer num, write a function which returns True if num is a perfect square else False. Note: Do not use any built-in library functio 阅读全文

posted @ 2016-07-26 10:37 北叶青藤阅读(154) 评论(0) 推荐(0)

Find Leaves of Binary Tree

摘要： Given a binary tree, collect a tree's nodes as if you were doing this: Collect and remove all leaves, repeat until the tree is empty. Example:Given bi 阅读全文

posted @ 2016-07-26 01:03 北叶青藤阅读(208) 评论(0) 推荐(0)

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