备注:在 LeetCode 中的运行时间也不是特别慢。 Java 实现 importjava.util.Map;importjava.util.HashMap;importjava.util.List;importjava.util.ArrayList;classSolution{publicList<Integer>topKFrequent(int[] nums,intk){// 统计元素的频率Map<Integer, Integer> freqMap =newHashMap<>();for(intnum : nums...
FindHeaderBarSize FindTabBarSize FindBorderBarSize Given an integer arraynumsand an integerk, returnthekmost frequent elements. You may return the answer inany order. Example 1: Input:nums = [1,1,1,2,2,3], k = 2Output:[1,2] Example 2: Input:nums = [1], k = 1Output:[1] Cons...
Given a non-empty array of integers,returnthe 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 better than O(n log n), whe...
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 better than O(n log...
func topKFrequent(nums []int, k int) []int { // 统计 nums 中每个数字出现的次数, // 时间复杂度为 O(n) ,空间复杂度为 O(n) numToCnt := make(map[int]int) for _, num := range nums { // num 如果不在 num_to_cnt 中,则初始化为 0 , // 然后对 num 的出现次数加 1 numToCn...
[leetcode] 347. Top K Frequent Elements Description Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: AI检测代码解析 nums = [1,1,1,2,2,3], k = 2 1. Output: AI检测代码解析 [1,2]
之后,我们返回 items 列表中的前 k个元组的key即可。 3 Python 解题代码 其实小根堆也可以结合 Counter 字典(官方解法一:哈希表+排序),所以我们先演示 Counter。 3.1 Counter - 哈希表+排序 解题代码 ## LeetCode 692E - The K Frequent Word - Counter,字典数据结构 from typing import List from collections...
Input:["i","love","leetcode","i","love","coding"],k=2 Output:["i","love"] Explanation:"i"and"love"are the two most frequent words. Notethat"i"comes before"love"due to a lower alphabetical order. Example 2: Input:["the","day","is","sunny","the","the","the","sunny",...
https://leetcode.com/problems/top-k-frequent-elements/ 3种方法 https://leetcode.com/discuss/100713/3-ways-to-solve-this-problem 普通方法heap O(nlogn): classSolution{public:vector<int>topKFrequent(vector<int>&nums,intk){unordered_map<int,int>mp;for(auto&i:nums)mp[i]++;priority_queue<...
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 better than O(n ...