Given a binary tree, return thezigzag level ordertraversal of its nodes' values. (ie, from left to right, then right to left for the next level and al...
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其他好文 时间：
2014-08-16 00:59:49
阅读次数：
179
Given an integer n, generate a square matrix filled with elements from 1 to n2 in
spiral order.
For example,
Given n = 3,
You should return the following matrix:
[
[ 1, 2, 3 ],
[ 8, 9, 4 ],
[...
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其他好文 时间：
2014-08-15 22:37:39
阅读次数：
274
This problem can be solve in simpler O(NsqrtN) solution, but I will describe O(NlogN) one.
We will solve this problem in offline. For each x (0?≤?x?n) we
should keep all the queries that end in x...
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其他好文 时间：
2014-08-15 21:11:49
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292
Given a collection of integers that might contain duplicates,S, return all possible subsets.Note:Elements in a subset must be in non-descending order....
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其他好文 时间：
2014-08-15 21:08:29
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212
Twilight Sparkle was playing Ludo with her friends Rainbow Dash, Apple Jack and Flutter Shy. But she kept losing. Having returned to the castle, Twili...
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其他好文 时间：
2014-08-15 20:56:29
阅读次数：
215
One day, Twilight Sparkle is interested in how to sort a sequence of integersa1,?a2,?...,?anin non-decreasing order. Being a young unicorn, the only o...
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其他好文 时间：
2014-08-15 20:55:49
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206
Twilight Sparkle once got a crystal from the Crystal Mine. A crystal of size n (n is odd; n?>?1) is an n?×?n matrix with a diamond inscribed into it.Y...
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其他好文 时间：
2014-08-15 20:54:59
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210
Given a set of distinct integers, S, return all possible subsets.Note:Elements in a subset must be in non-descending order.The solution set must not c...
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其他好文 时间：
2014-08-15 17:18:39
阅读次数：
177
Spiral MatrixGiven a matrix ofmxnelements (mrows,ncolumns), return all elements of the matrix in spiral order.For example,Given the following matrix:[...
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其他好文 时间：
2014-08-15 17:17:29
阅读次数：
176
对2维数组或者多维数组排序是常见的问题，在php中我们有个专门的多维数组排序函数，下面简单介绍下：
array_multisort(array1,sorting order, sorting type,array2,array3..）是对多个数组或多维数组进行排序的函数。
array1
必需。规定输入的数组。
sorting order
可选。...
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Web程序 时间：
2014-08-15 14:42:58
阅读次数：
288
