算法分析

P. Flajolet, W. Szpankowski
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引用次数: 247

摘要

3.二分查找有以下算法。看一下数组的中间元素。如果元素是开始查找的元素(目标),则返回FOUND。否则,如果元素大于目标,则递归搜索数组的下半部分。否则,递归地搜索数组的上半部分。如果数组包含三个或更少的元素,则对数组执行线性搜索,如果找到则返回FOUND,否则返回MISSING。下面哪个递归式描述了二分搜索?
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of algorithms
3. Binary search has the following algorithm. Look at the middle element in an array. If the element is the one begin looked for (the target), return FOUND. Otherwise, if the element is greater than the target, recursively search the lower half of the array. Otherwise, recursively search the upper half of the array. If the array consists of three or fewer elements, perform a linear search of the array, returning FOUND if found and MISSING otherwise. Which of the following recurrence equations describe binary search?
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