二分搜索(Binary Search) 文承上篇,搜索算法中除了深度优先搜索(DFS)和广度优先搜索(BFS),二分搜索(Binary Search)也是最基础搜索算法之一。 二分搜索也被称为折半搜索(Half-interval Search)也有说法为对数搜索算法(Logarithmic Search),用于在已排序的数据集中查找特定元素。
Binary Search is a searching algorithm for finding an element's position in a sorted array. In this tutorial, you will understand the working of binary search with working code in C, C++, Java, and Python.
数组中存在重复元素,处理方法与上一道题Search in Rotated Sorted Array一样,对边缘移动一步,直到边缘和中间不在相等或者相遇,这就导致了会有不能切去一半的可能。所以最坏情况(比如全部都是一个元素,或者只有一个元素不同于其他元素,而他就在最后一个)就会出现每次移动一步,总共是n步,算法的时间复杂度变成O(n...
LeetCode - First Bad Version LeetCode - Valid Perfect Square LeetCode - Find Peak Element LeetCode - Search in Rotated Sorted Array LeetCode - Find Right Interval Codeforces - Interesting Drink Codeforces - Magic Powder - 1 Codeforces - Another Problem on Strings ...
lintcode:Binary Search 二分查找 题目: 二分查找 给定一个排序的整数数组(升序)和一个要查找的整数target,用O(logn)的时间查找到target第一次出现的下标(从0开始),如果target不存在于数组中,返回-1。 样例 在数组[1, 2, 3, 3, 4, 5, 10]中二分查找3,返回2。
You are given therootof a binary search tree (BST) and an integerval. Find the node in the BST that the node's value equalsvaland return the subtree rooted with that node. If such a node does not exist, returnnull. Example 1: ...
( Node <T>*current ); bool searchVal ( const T &val ) const; bool searchVal ( Node<T> *current , const T &val ) const; int sizeBST ( ) const; int sizeBST ( const Node <T> *current ) const; void inorderBST () const ; void inorderBST ( const Node <T>*current ) const...
coding, binary sequences can also be used to represent text, image files, audio files, and even executable code. binary sequences offer great flexibility when it comes to representing different kinds of data, making them ideal for use in computing applications. can binary search be used for ...
The root of the binary search tree18* @param k1: An integer19* @param k2: An integer20* @return: return: Return all keys that k1<=key<=k2 in ascending order21*/22vector<int> searchRange(TreeNode * root,intk1,intk2) {23//write your code here24vector<int>num ;25inorder(num, ro...
二分查找法作为一种常见的查找方法,将原本是线性时间提升到了对数时间范围,大大缩短了搜索时间,具有很大的应用场景,而在 LeetCode 中,要运用二分搜索法来解的题目也有很多,但是实际上二分查找法的查找目标有很多种,而且在细节写法也有一些变化。之前有网友留言希望博主能针对二分查找法的具体写法做个总结,博主由于...