所以,可以遍历一遍数组,然后根据数组中,值对应的数组元素是正数还是负数,把偶数的元素搞出来,在使用set做下去重,最后输出array 思路二:思路比较巧妙,利用首次出现时,数组下标对应的元素应该为正数,出现第二次时,数组下标对应的元素应该为负数,所以一旦以数组中值为下标的元素为负数时,表示该值已经出现过一次 ,现在是...
(i.e.,0 1 2 4 5 6 7might become4 5 6 7 0 1 2). You are given a target value to search. If found in the array return its index, otherwise return -1. You may assume no duplicate exists in the array. 思路: 给你一个已排序好但移位了的数组,找到特定的数。画一幅图就很容易理解...
Task:You are given an integer arraypriceswhereprices[i]is the price of a given stock on theithday. On each day, you may decide to buy and/or sell the stock. You can only holdat most oneshare of the stock at any time. However, you can buy it then immediately sell it on thesame ...
XOR Operation in an Array XOR Queries of a Subarray README.md LeetCode-Problem-Sets Answers for the leetcode problems Solutions MAY vary with offical LeetCode Solutions. PLEASE do a pull request for more elegant solutions(New Issue Request Template, make sure to read it!). Tips for begin...
【题目】Given a non-empty array containing only positive integers, find if the array can be partitioned into two subsets such that the sum of elements in both subsets is equal. Note: Each of the array element will not exceed 100. The array size will not exceed 200. Example 1: ...
LeetCode 287 Find the Duplicate Number Medium It's a problem on array, but it can be converted to a linked list problem similar to Linked List Cycle II. Use slow = nums[slow]; fast = nums[nums[fast]]; to move to the next node in the "linked list". It takes O(n) time. Anothe...
Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. Credits: Special thanks to @ts for adding this problem an...
You are not suppose to use the library’s sort function for this problem. Day 1342 答案揭晓 DS Interview Question & Answer What is Principal Component Analysis? What are its applications and limitations? Suppose we want...
// Solution 1: A hard problem. It took me almost two hours to get it done. Too tired to say a word. Just pray you don't meet it in a real battle, because chances are that you're gonna be f*ed up. 代码1 // Code 1 421 Maximum XOR of Two Numbers in an Array // #421 俩...
0215 Kth Largest Element in an Array Go 55.3% Medium 0216 Combination Sum III Go 56.5% Medium 0217 Contains Duplicate Go 56.0% Easy 0218 The Skyline Problem Go 34.5% Hard 0219 Contains Duplicate II Go 37.7% Easy 0220 Contains Duplicate III Go 20.9% Medium 0221 Maximal Square 37.7...