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最新文章列表
Binary Search
Algorithm: Binary-Search(numbers[], x, l, r)
if l = r then
return l
else
m := ⌊(l + r) / 2⌋
if x ≤ numbers[m] then
return Binary-Search(numbers[], x, l, m)
else
...
判断给定的一个数字x是否在指定的一个有序的数字序列中存在[二分查找方式]
package tree.binarytree;
/**
* Created by Lanxiaowei
* Craated on 2016/12/12 13:51
* 判断给定的一个数字x是否在指定的一个有序的数字序列中存在
* 采用二分查找方式实现
*/
public class Test4 {
public static void main(Stri ...
LeetCode 154 - 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 sorted array is rotated at some ...
LeetCode 153 - 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.
You may assume no duplicate exists in the arr ...
LeetCode - Search for a Range
Given a sorted array of integers, find the starting and ending position of a given target value.
Your algorithm's runtime complexity must be in the order of O(log n).
If the target is not found i ...
基础数据结构和算法八:Binary search
Binary search needs an ordered array so that it can use array indexing to dramatically reduce the number of compares required for each search, using the classic and venerable binary search algorithm. ...
Symbol tables
1. Key-value pair abstraction. (Associative array abstraction. Associate one value with each key)
a) Insert a value with specified key.
b) Given a key, search for the corresponding value. ...
二分查找算法(Binary Search)
项目中遇到需要从数组中查找数据,但是算法很多,于是根据项目需求,选定了二分查找算法!
二分法检索(binary search)又称折半检索,二分法检索的基本思想是设字典中的元素从小到大有序地存放在数组(array)中。
所以使用二分查找算法要求数组是已经排好序的数组!
排序代码:java.util.Arrays.sort(Object[] a)
查找代码:java.util.Arrays.bi ...
二分法查找第一个满足条件的项
public class BinSearch1st {
Random random = new Random();
/**
* 二分查找,找到s的下标,如果没有返回-1
* @param arr
* @param s
* @return
*/
public int bsearch(int[] ar ...