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AppStore 内购验证的方法
AppStore增加了验证内购(In App Purchasement)的方法, 就是苹果提供一个url地址, 开发测试用:https://sandbox.itunes.apple.com/verifyReceipt产品用:https://buy.itunes.apple.com/verifyRec...
分类:移动开发   时间:2014-05-19 22:22:12    阅读次数:936
leetcode Best Time to Buy and Sell Stock III
思路:知道要用DP做,但是一开始思路是错的。后来参考了http://blog.csdn.net/pickless/article/details/12034365才意识到可以在整个区间的每一点切开,然后分别计算左子区间和右子区间的最大值,然后再用O(n)时间找到整个区间的最大值。看来以后碰到与2相关...
分类:其他好文   时间:2014-05-19 14:13:38    阅读次数:286
POJ 2828 Buy Tickets(神题!线段树or树状数组)
题目链接:POJ 2828 Buy Tickets【题意】给了你 n(1 7 #include 8 #include 9 using namespace std;10 const int MAX = 200005;11 12 int pos[MAX], val[MAX], ans[MAX];13.....
分类:其他好文   时间:2014-05-19 10:10:34    阅读次数:282
Kerberos安全体系详解---Kerberos的简单实现
1. Kerberos简介1.1. 功能一个安全认证协议用tickets验证避免本地保存密码和在互联网上传输密码包含一个可信任的第三方使用对称加密客户端与服务器(非KDC)之间能够相互验证Kerberos只提供一种功能——在网络上安全的完成用户的身份验证。它并不提供授权功能或者审计功能。1.2. 概...
分类:其他好文   时间:2014-05-19 08:25:08    阅读次数:359
【leetcode】Best Time to Buy and Sell Stock
Say you have an array for which theithelement is the price of a given stock on dayi.If you were only permitted to complete at most one transaction (ie...
分类:其他好文   时间:2014-05-18 20:30:16    阅读次数:301
hdu2844
题目链接: 点击打开链接 题目: Whuacmers use coins.They have coins of value A1,A2,A3...An Silverland dollar. One day Hibix opened purse and found there were some coins. He decided to buy a very nice watch...
分类:其他好文   时间:2014-05-18 15:56:34    阅读次数:264
poj 1952 BUY LOW, BUY LOWER 最长下降子序列+统计不重复方案数
dp[i]=max(dp[i],dp[j]+1) ja[i] dp[i]表示长度为i的最长下降子序列的长度。 r[i]表示长度为i的最长下降子序列的方案数。 考虑这样一个问题,比如6 3 9 3,对于两个3,他们数字一样并且dp值也一样,那么r[2]的方案数是没有意义的 因为能通过第一个3扩展的也能通过第二个3扩展,所以直接把r[2]=0。 对于一次扩展若dp[j]+1==dp[i],则...
分类:其他好文   时间:2014-05-18 06:31:43    阅读次数:249
Best Time to Buy and Sell Stock I && II && III
题目1:Best Time to Buy and Sell Stock 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 (ie,...
分类:其他好文   时间:2014-05-16 01:46:15    阅读次数:460
Leetcode:Best Time to Buy and Sell Stock
Best Time to Buy and Sell Stock1Say you have an array for which theithelement is the price of a given stock on dayi.If you were only permitted to comp...
分类:其他好文   时间:2014-05-14 22:36:11    阅读次数:353
Best Time to Buy and Sell Stock III
Total Accepted: 8400 Total Submissions: 38235 My Submissions Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profi...
分类:其他好文   时间:2014-05-14 19:39:53    阅读次数:275
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