Follow up for "Search in Rotated Sorted Array":What ifduplicatesare allowed?Would this affect the run-time complexity? How and why?Write a function to...
分类:
其他好文 时间:
2014-11-16 08:12:43
阅读次数:
145
Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e.,0 1 2 4 5 6 7might become4 5 6 7 0 1 2).You are given a target value t...
分类:
其他好文 时间:
2014-11-16 07:06:34
阅读次数:
174
Similar with version I, but analysis is different. With the possibility of duplication, only ">" indicate a definite case of next search space.class S...
分类:
其他好文 时间:
2014-11-15 16:56:14
阅读次数:
201
There's usually a common strategy for "find *" problems - binary search: half the space can be dropped by some rules.And take care of corner cases.cla...
分类:
其他好文 时间:
2014-11-15 16:53:56
阅读次数:
171
Question:Given a sorted array of n integers that has been rotated an unknown number of times, give an O(log n) algorithm that finds an element in the ...
分类:
其他好文 时间:
2014-11-14 01:30:09
阅读次数:
118
O(n)的算法就不说了,这题主要考查的是 O(logn)的算法。有序数组容易想到使用二分查找解决,这题就是在二分基础上做一些调整。数组只有一次翻转,可以知道原有序递增数组被分成两部分,这俩部分都是有序递增的(这题只需要考虑有序数组的递增情况)。假如翻转后的数组以第 x 个结点分为两部分 A[0..x] 和 A[x+1..n]。则 A[0..x] 这一段是有序递增的, A[x+1..m] 这一段也是...
分类:
编程语言 时间:
2014-11-11 12:44:02
阅读次数:
261
递归public class Solution {
public int findMin(int[] num) {
return helper(num, 0, num.length-1);
}
//with duplicate
public static int helper(int[] a, int left, int right){
...
分类:
编程语言 时间:
2014-11-11 12:40:09
阅读次数:
211
题目: Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e.,0 1 2 4 5 6 7might become4 5 6 7 0 1 2). You are given a targe...
分类:
其他好文 时间:
2014-11-10 13:41:57
阅读次数:
203
Oriented FAST and Rotated BRIEF这篇文章我们将介绍一种新的具有局部不变性的特征 —— ORB特征,从它的名字中可以看出它是对FAST特征点与BREIF特征描述子的一种结合与改进,这个算法是由Ethan Rublee,Vincent Rabaud,Kurt Konolig...
分类:
其他好文 时间:
2014-11-08 18:05:09
阅读次数:
366
Follow up for "Search in Rotated Sorted Array":
What if duplicates are allowed?
Would this affect the run-time complexity? How and why?
Write a function to determine if a given target is in the...
分类:
其他好文 时间:
2014-11-07 19:10:51
阅读次数:
161