Given a non-empty list of words, return the k most frequent elements. Your answer should be sorted by frequency from highest to lowest. If two words have the same frequency, then the word with the lower alphabetical order comes first. Example 1: Inpu…
大家好,这里是<齐姐聊算法>系列之 Top K 问题. Top K 问题是面试中非常常考的算法题. 8 Leetcode 上这两题大同小异,这里以第一题为例. 题意: 给一组词,统计出现频率最高的 k 个. 比如说 "I love leetcode, I love coding" 中频率最高的 2 个就是 I 和 love 了. 有同学觉得这题特别简单,但其实这题只是母题,它可以升级到系统设计层面来问: 在某电商网站上,过去的一小时内卖出的最多的 k 种货物. 我们先看算法…
Given a non-empty list of words, return the k most frequent elements. Your answer should be sorted by frequency from highest to lowest. If two words have the same frequency, then the word with the lower alphabetical order comes first. Example 1: Inpu…
Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements. Your algorithm's time complexity must be…
Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: nums = [1,1,1,2,2,3], k = 2 Output: [1,2] Example 2: Input: nums = [1], k = 1 Output: [1] Note: You may assume k is always valid, 1 ≤ k ≤ number of unique ele…
