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LeetCode: Path Sum II [113]
【题目】 Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum. For example: Given the below binary tree and sum = 22, 5 / 4 8 / / 11 13 4 ...
分类:其他好文   时间:2014-06-20 10:53:08    阅读次数:181
projecteuler---->problem=20----Factorial digit sum
n! means n (n 1) ... 3 2 1 For example, 10! = 10 9 ... 3 2 1 = 3628800, and the sum of the digits in the number 10! is 3 + 6 + 2 + 8 + 8 + 0 + 0 = 27. Find the sum of the digits...
分类:其他好文   时间:2014-06-20 09:34:10    阅读次数:215
Swift学习——A Swift Tour 枚举和结构体
Enumerations and Structures Enumerations   枚举的使用 使用 enum 定义一个枚举,枚举里面可以关联方法,比如下文中的描述方法 enum Rank: Int { case Ace = 1 case Two, Three, Four, Five, Six, Seven, Eight, Nine, Ten case Ja...
分类:其他好文   时间:2014-06-20 09:03:39    阅读次数:322
LeetCode: Path Sum [112]
【题目】 Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum. For example: Given the below binary tree and sum = 22, 5 / ...
分类:其他好文   时间:2014-06-07 13:57:37    阅读次数:210
projecteuler---->problem=18----Maximum path sum I
By starting at the top of the triangle below and moving to adjacent numbers on the row below, the maximum total from top to bottom is 23. 3 7 4 2 4 6 8 5 9 3 That is, 3 + 7 + 4 + 9 = 23. Find th...
分类:其他好文   时间:2014-06-07 13:45:25    阅读次数:189
projecteuler---->problem=21----Amicable numbers
Let d(n) be defined as the sum of proper divisors of n (numbers less than n which divide evenly into n). If d(a) = b and d(b) = a, where a b, then a and b are an amicable pair and each of a and b...
分类:其他好文   时间:2014-06-07 13:40:53    阅读次数:226
即将开源,码晒客/疯狂创意二维码,个性二维码底层。
二维码:二维码(Two-dimensional code),又称二维条码,它是用特定的几何图形按一定规律在平面(二维方向)上分布的黑白相间的图形,是所有信息数据的一把钥匙。在现代商业活动中,可实现的应用十分广泛,如:产品防伪/溯源、广告推送、网站链接、数据下载、商品交易、定位/导航、电子凭证、车辆管...
分类:其他好文   时间:2014-06-07 08:05:10    阅读次数:269
leetcode--Two Sum
Given an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the two nu...
分类:其他好文   时间:2014-06-05 14:15:07    阅读次数:221
leetcode--Add Binary
Given two binary strings, return their sum (also a binary string).For example,a ="11"b ="1"Return"100".public class Solution { /**The program is us...
分类:其他好文   时间:2014-06-05 14:08:35    阅读次数:188
leetcode--Swap Nodes in Pairs
Given a linked list, swap every two adjacent nodes and return its head.For example,Given1->2->3->4, you should return the list as2->1->4->3.Your algor...
分类:其他好文   时间:2014-06-05 13:41:44    阅读次数:231
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