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一二三
A - 一二三Time Limit:1000MS Memory Limit:65535KB 64bit IO Format:%I64d & %I64uSubmitStatusDescription你弟弟刚刚学会写英语的一(one)、二(two)和三(three)。他在纸上写了好些一二...
分类:其他好文   时间:2014-08-16 00:59:19    阅读次数:203
HDU 4772 Zhuge Liang's Password 选择矩阵
本题需要使用选择矩阵的程序求解,这个和Leetcode上的一个程序是一样道理的。如果使用额外空间,那么是很容易做到的,这里不使用额外空间,直接使用到位操作,空间效率是O(1),这是个非常漂亮的到位旋转程序。 题意还是很重要,这次看错了一句话,就WA了一次: The maximum amount of cells which contains two equal numbers after ov...
分类:其他好文   时间:2014-08-15 22:35:29    阅读次数:288
HDU 1151 Air Raid(最小路径覆盖 = 顶点数 - 最大匹配数)
Air Raid Problem Description Consider a town where all the streets are one-way and each street leads from one intersection to another. It is also known that starting from an intersection and wal...
分类:其他好文   时间:2014-08-15 21:13:29    阅读次数:407
leetcode -- Merge Sorted Array
过去已无法改变,未来又难以琢磨,我们只能把握当下[问题描述]Given two sorted integer arrays A and B, merge B into A as one sorted array.Note:You may assume that A has enough space ...
分类:其他好文   时间:2014-08-15 21:02:49    阅读次数:165
leetcode 之 Recover Binary Search Tree
Recover Binary Search Tree Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. Note: A solution using O(n) space is pretty s...
分类:其他好文   时间:2014-08-15 19:39:39    阅读次数:222
LeetCode (1) Merge Sorted Array
题目: Given two sorted integer arrays A and B, merge B into A as one sorted array. Note: You may assume that A has enough space to hold additional elements from B. The number of elements initia...
分类:其他好文   时间:2014-08-15 18:00:09    阅读次数:194
ZOJ2507-Let's play a game(Anti-Nim)
Let's play a game Time Limit: 2 Seconds      Memory Limit: 65536 KB Elves from the Lothvain forest have created a very interesting game. The rules are very simple: There are two players. ...
分类:其他好文   时间:2014-08-15 17:56:19    阅读次数:251
UVA 12096 STL map set 的使用
set这个容器也是STL库的一员,并且在algorithm内直接有 set_union set_intersection 这样求并集交集的操作map 最方便的地方就是 支持下标访问举例说明 : 1 #include 2 include 3 #include 4 #include 5 #include...
分类:其他好文   时间:2014-08-15 17:24:09    阅读次数:220
【HackerRank】Pairs
题目链接:Pairs完全就是Two Sum问题的变形!Two Sum问题是要求数组中和正好等于K的两个数,这个是求数组中两个数的差正好等于K的两个数。总结其实就是“骑驴找马”的问题:即当前遍历ar[i],那么只要看数组中是否存在ar[i]+K或者ar[i]-K就可以了,还是用HashMap在O(1)...
分类:其他好文   时间:2014-08-15 17:17:19    阅读次数:123
数字和字符串。
1,创建字符串,有@都是对象。NSString *myString1 = @"My String One”;将一个utf8编码的字符串实例化成对象NSString *myString2 = [NSString stringWithUTF8String:"My String Two"];第三种写法NS...
分类:其他好文   时间:2014-08-15 14:25:48    阅读次数:289
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