北叶青藤

2016年8月3日

116. Populating Next Right Pointers in Each Node

摘要： Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its ne 阅读全文

posted @ 2016-08-03 02:31 北叶青藤阅读(289) 评论(0) 推荐(0)

340. Longest Substring with At Most K Distinct Characters

摘要： Given a string, find the longest substring that contains only two unique characters. For example, given "abcbbbbcccbdddadacb", the longest substring t 阅读全文

posted @ 2016-08-03 01:05 北叶青藤阅读(307) 评论(0) 推荐(0)

2016年8月2日

Bulb Switcher

摘要： There are n bulbs that are initially off. You first turn on all the bulbs. Then, you turn off every second bulb. On the third round, you toggle every 阅读全文

posted @ 2016-08-02 12:59 北叶青藤阅读(186) 评论(0) 推荐(0)

Largest Divisible Subset

摘要： Given a set of distinct positive integers, find the largest subset such that every pair (Si, Sj) of elements in this subset satisfies: Si % Sj = 0 or 阅读全文

posted @ 2016-08-02 10:27 北叶青藤阅读(189) 评论(0) 推荐(0)

Multiply Strings

摘要： Given two numbers represented as strings, return multiplication of the numbers as a string. Note: The numbers can be arbitrarily large and are non-neg 阅读全文

posted @ 2016-08-02 00:45 北叶青藤阅读(177) 评论(0) 推荐(0)

2016年8月1日

Integer Break

摘要： Given a positive integer n, break it into the sum of at least two positive integers and maximize the product of those integers. Return the maximum pro 阅读全文

posted @ 2016-08-01 23:23 北叶青藤阅读(193) 评论(0) 推荐(0)

Bulls and Cows

摘要： You are playing the following Bulls and Cows game with your friend: You write down a number and ask your friend to guess what the number is. Each time 阅读全文

posted @ 2016-08-01 12:21 北叶青藤阅读(289) 评论(0) 推荐(0)

Rectangle Area

摘要： 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 s 阅读全文

posted @ 2016-08-01 04:41 北叶青藤阅读(239) 评论(0) 推荐(0)

Excel Sheet Column Title & Excel Sheet Column Number

摘要： Excel Sheet Column Title Given a positive integer, return its corresponding column title as appear in an Excel sheet. For example: Given a column titl 阅读全文

posted @ 2016-08-01 03:34 北叶青藤阅读(309) 评论(0) 推荐(0)

339. Nested List Weight Sum I & II

摘要： Nested List Weight Sum I Given a nested list of integers, return the sum of all integers in the list weighted by their depth. Each element is either a 阅读全文

posted @ 2016-08-01 02:55 北叶青藤阅读(329) 评论(0) 推荐(0)

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