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. ...
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其他好文 时间:
2017-06-10 21:31:05
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146
一、题目 1、描述 2、题意 在一个有序但可能经过左右移动的数组里求出目标数的下标! 二、解答 1、思路: 可以采用依次比较的方法 2、优化: 因为移动后,一定有一个数字是最大的且该数将数组分成左右两边,左边的每一个数都比右边大,或者右边的数都比左边大!所以可以找出中间数,然后采用两次二分查找即可! ...
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其他好文 时间:
2017-05-30 21:00:48
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166
Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Not ...
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其他好文 时间:
2017-05-29 09:54:00
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126
这道题是Search in Rotated Sorted Array的扩展,差别就是如今不是找一个目标值了,而是在bst中找最小的元素。主要思路还是跟Search in Rotated Sorted Array差点儿相同。还是通过左边界和中间的大小关系来得到左边或者右边有序的信息。假设左半边有序。那 ...
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其他好文 时间:
2017-05-25 19:51:16
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126
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 functi ...
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编程语言 时间:
2017-05-25 11:55:11
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153
题目: 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). You are given a targe ...
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其他好文 时间:
2017-05-07 23:05:47
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181
O(logN) Important Point: Once the target is in one section, use the point in that section as benchmark In this problem, if the target >= startVal, use ...
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其他好文 时间:
2017-05-04 09:49:34
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229
The worst situation O(N). Actually we can either just loop through, or we can compare num[mid] with the num[end], if they are the same, that means it' ...
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其他好文 时间:
2017-05-04 09:40:05
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196
O(N) if element can repeat, the worst case, you cannot throw away any section. eg. [1, 1, 1, 1, 0, 1, 1] target = 0, you cannot throw any section. We ...
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其他好文 时间:
2017-05-04 09:39:13
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156
题目: Follow up for "Search in Rotated Sorted Array":What if duplicates are allowed? Would this affect the run-time complexity? How and why? Suppose an ...
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其他好文 时间:
2017-05-03 14:36:34
阅读次数:
165