Find an element in hidden array There is an array of length N consisting of non-negative integers. The array is sorted in non-decreasing order. Each number in the array appears exactly K times, except one element, which appears at least once, but les…

题意:有一串不递减的串,串中的任意元素都有k个,除了一个元素,他只有1 <= n < k-1个,你现在能向oj做出以下操作: 输出:1 pos,oj会返回pos位置的元素值 输出:2 val,回答那个特殊的元素是什么值 要求不能询问超过60次,给出特殊元素的值. 思路:先第一次二分找出k.可以想出,k * m和k * m + 1如果不同,那么k * m之前的数肯定没有特殊元素,反之则有,那么我们就找出第一个k * m == k * m + 1的地方,这之前的元素就是特殊元素. 每次printf…

题意懒得抄了,大概是:在升序数组中给定整数target,找到第一个和最后一个target的索引,找到返回{index1, index2},否则返回{-1, -1}: 时间复杂度要求:O(logn) 分析:要求对数时间,又是查找,我们不难想到二分查找.但是有一点,怎么查到第一个和最后一个呢?这困扰了我. 算法:来自leetcode caikehe 1. 使用二分变体,查找target作为index1,再找target+1, 作为index2: 2. 对index做判断,如果它未越界且它的对应值等于…

Learn this from stackflow. public class test { public static void main(String[] args) throws IOException { int [] a={1,2,3,4,4,4,5,4,4}; int r=GetMajorElement(a); System.out.println(r); } //check the element in the array occurs more than half of the…

Find K-th largest element in an array. Notice You can swap elements in the array Example In array [9,3,2,4,8], the 3rd largest element is 4. In array [1,2,3,4,5], the 1st largest element is 5, 2nd largest element is 4, 3rd largest element is 3 and et…

https://leetcode.com/problems/count-of-smaller-numbers-after-self/ You are given an integer array nums and you have to return a new counts array. The counts array has the property where counts[i] is the number of smaller elements to the right of nums…

leetcode面试准备:Kth Largest Element in an Array 1 题目 Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. For example, Given [3,2,1,5,6,4] and k = 2, return 5. Note…

Problem Statement Given a large array of non-negative integer numbers, write a function which determines whether or not there is a number that appears in the array more times than all other numbers combined. If such element exists, function should re…

本人编程小白,如果有写的不对.或者能更完善的地方请个位批评指正! 这个是leetcode的第34题,这道题的tag是数组,需要用到二分搜索法来解答 34. Find First and Last Position of Element in Sorted Array Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target v…

leetcode-algorithms-34 Find First and Last Position of Element in Sorted Array Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target value. Your algorithm's runtime complexity must be in th…