Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between).
zigzag层序遍历树
For example:
Given binary...
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其他好文 时间:
2014-08-09 23:19:59
阅读次数:
363
Problem Description
PM Room defines a sequence A = {A1, A2,..., AN}, each of which is either 0 or 1. In order
to beat him, programmer Moor has to construct another sequence B = {B1, B2,... , BN} of...
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其他好文 时间:
2014-08-09 21:34:09
阅读次数:
365
--摘录自《T-SQL编程入门经典》 ROW_NUMBER()函数根据作为参数传递给这个函数的 ORDER BY 子句的值,返回一个不断递增的整数值。如果 ROW_NUMBER 的 ORDER BY 的值和结果集中的顺序相匹配,返回值将是递增的,以升序排列。如果 ROW_NUMBER 的 ORDE....
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其他好文 时间:
2014-08-09 13:25:17
阅读次数:
270
Binary Tree Level Order Traversal IIGiven a binary tree, return thebottom-up level ordertraversal of its nodes' values. (ie, from left to right, level...
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其他好文 时间:
2014-08-08 23:53:16
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221
Given an array and a value, remove all instances of that value in place and return the new length.The order of elements can be changed. It doesn't mat...
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其他好文 时间:
2014-08-08 23:52:12
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238
Binary Tree Level Order TraversalGiven a binary tree, return thelevel ordertraversal of its nodes' values. (ie, from left to right, level by level).Fo...
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其他好文 时间:
2014-08-08 23:51:06
阅读次数:
265
Binary Tree Zigzag Level Order TraversalGiven a binary tree, return thezigzag level ordertraversal of its nodes' values. (ie, from left to right, then...
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其他好文 时间:
2014-08-08 23:48:36
阅读次数:
307
Northwind数据库,选取价格第二高的产品。有两种方法,一个是用Row_Number()函数:SELECT productname FROM (SELECT TOP 2 productname, Row_Number() OVER (ORDER BY unitprice desc) AS...
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数据库 时间:
2014-08-08 21:15:36
阅读次数:
244
oracle 里面经常这样用select col1,col2..., row_number() over (partition by colx order by coly) from table_name;;这句话的意思是把表中的数值按照colx 分组,每一组内部按照coly排序,同时 row_nu...
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数据库 时间:
2014-08-08 20:40:56
阅读次数:
307
Problem Description
Let A be an integral series {A1, A2, . . . , An}.
The zero-order series of A is A itself.
The first-order series of A is {B1, B2, . . . , Bn-1},where Bi = Ai+1 - Ai.
Th...
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编程语言 时间:
2014-08-08 16:12:48
阅读次数:
200