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Leetcode: Find Minimum in Rotated Sorted Array
Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2).Find the minimum element.Yo...
分类:其他好文   时间:2014-11-22 11:53:59    阅读次数:149
Leetcode: Min Stack
Design a stack that supports push, pop, top, and retrieving the minimum element in constant time.push(x) -- Push element x onto stack.pop() -- Removes...
分类:其他好文   时间:2014-11-22 07:04:11    阅读次数:193
Leetcode-Find Minimum in Rotated Sorted Array II
Follow up for "Find Minimum in Rotated Sorted Array":What if duplicates are allowed?Would this affect the run-time complexity? How and why?Suppose a s...
分类:其他好文   时间:2014-11-22 07:03:46    阅读次数:206
Leetcode-Find Minimum in Rotated Sorted Array
Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2).Find the minimum element.Yo...
分类:其他好文   时间:2014-11-22 07:02:08    阅读次数:190
次小生成树 [POJ 1679] The Unique MST
The Unique MSTDescriptionGiven a connected undirected graph, tell if its minimum spanning tree is unique.Definition 1 (Spanning Tree): Consider a conn...
分类:其他好文   时间:2014-11-20 13:28:58    阅读次数:202
Triangle
题目描述: Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below. For example, given the following triangle [ [2], ...
分类:其他好文   时间:2014-11-20 12:03:48    阅读次数:157
Triangle
TriangleGiven a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below.For example, given...
分类:其他好文   时间:2014-11-20 01:28:14    阅读次数:180
RMQ(range minimum/maximum query)即查询区间最大最小值。
对于求区间最大最小值,我们自然而然就想到了一个O(n)时间复杂度的算法,但是如果询问有很多呢?这样必然超时。当然我们可以用线段树来解,使得每一次查询的时间降到log(n),但是对于RMQ算法,只要我们做了些预处理,之后的查询我们仅需要O(1)的时间。Sparse_Table算法是解决RMQ问题的一类...
分类:其他好文   时间:2014-11-19 23:55:43    阅读次数:250
[leetcode]Minimum Path Sum
问题描述: Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its path. Note: You can only move either down or ...
分类:其他好文   时间:2014-11-19 22:23:49    阅读次数:150
Triangle
Dynamic ProgrammingGiven a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below.For exa...
分类:其他好文   时间:2014-11-19 18:18:00    阅读次数:235
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