Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero. Note: The solution set must not contain duplicate triplets. Forexample, givenarrayS = [-1,0,1,2, -1, -4], A s...
我的解法:(与Spiral Matrix解法相同, 区别是rows和cols都是n, 定义count计数四边已经铺了数字的边框,定义num++;对四边分别for循环赋值, 内部与最外圈的区别就是多了一个count,包括起始条件+/-count, 终止条件+/-count; 前两个for顺序遍历, 中间插入判断条件break, 后两个for倒序;) (1.int[][],num,count;...
Search in a Sorted Infinite Array (medium) Minimum Difference Element (medium) Bitonic Array Maximum (easy) 12. Pattern: Top ‘K’ Elements,前K个系列 任何让我们求解最大/最小/最频繁的K个元素的题,都遵循这种模式。 用来记录这种前K类型的最佳数据结构就是堆了(译者注:在Java中,改了个名,叫优先队...
刷Easy和Medium难度的题足以应付大部分Entry Level的面试了,Hard难度的题在很少出现,而且理解起来很费时间,刷起来性价比很低。但是同学工作几年后到了Senior Level可能就要开始在这Hard问题一块侧重了。 可以把这些题作为例题,这一步的任务就是收集这些例题并熟悉他们的思路,让你以后再看到这些题的变种时能够像映射函...
LeetCode Top 100 Liked Questions 560. Subarray Sum Equals K (Java版; Medium) 题目描述 AI检测代码解析 Given an array of integers and an integer k, you need to find the total number of continuous subarrays whose sum equals to k.
leetcode_medium_array problem 33. Search in Rotated Sorted Array solution #1: 解题思路: 先使用二分法找出最小的元素,然后确定哪一边进行搜索,最后使用二分法搜索; code: 注意: 1. 二分法的思路和code必须熟练掌握; 2. 注意边界条件; ...
Given an array of strings, group anagrams together. For example, given:["eat", "tea", "tan", "ate", "nat", "bat"], Return: [ ["ate","eat","tea"], ["nat","tan"], ["bat"] ] Note: For the return value, eachinnerlist's elements must follow the lexicographic order. ...
1234.Replace-the-Substring-for-Balanced-String (H-) 1498.Number-of-Subsequences-That-Satisfy-the-Given-Sum-Condition (H-) 1574.Shortest-Subarray-to-be-Removed-to-Make-Array-Sorted (H-) 1580.Put-Boxes-Into-the-Warehouse-II (H-) 1687.Delivering-Boxes-from-Storage-to-Ports (H) 1793.Maximum...
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Your algorithm's runtime complexity must be in the order of O(log n). If the target is not found in the array, return [-1, -1]. 在一个升序的数组中,找出等于给定目标值首次出现后最后一次出现的位置,复杂度为O(log n),若果没有等于目标值的就返回[-1,-1] ...