sort.Slice(nums,func(i,jint)bool{ifnumToCnt[nums[i]]!=numToCnt[nums[j]]{returnnumToCnt[nums[i]]<numToCnt[nums[j]]}returnnums[i]>nums[j]})returnnums} 题目链接: Sort Array by Increasing Frequency: https://leetcode.com/problems/sort-array-by-increasing-frequency/ 按照频率将数组升序...
1636. Sort Array by Increasing Frequency 解题方法 先用collections.Counter计算频数存入字典,然后用sorted方法对字典中的键根据值顺序排序,第二关键字设置为键的倒序,返回一个元组组成的列表temp,其中每个元组的第一位是成员值,第二位是成员出现的次数,从头至尾遍历temp写元素即可。 时间复杂度:O(nlogn) 空间复杂...
【leetcode】1636. Sort Array by Increasing Frequency 题目如下: Given an array of integersnums, sort the array in increasing order based on the frequency of the values. If multiple values have the same frequency, sort them in decreasing order. Return thesorted array. Example 1: Input: nums =...
本题是LeetCode 1636 - 按照频率将数组升序排序 加强版,将数组换成了字符串,使用相同的思路即可通过。 先用一个 map 统计 s 中每个字符的出现次数。 然后对 s 中的字符按照出现次数降序排序,出现次数相同时,按字符升序排序(以保证相同字符在一起)。 最后转成字符串返回即可。 设字符集大小为 C 。 时间复杂...
https://leetcode.com/problems/sort-characters-by-frequency/#/description 特殊的排序,对频率排序。 1.常规思路,先遍历一遍,把频数存入map,再把map的entry存入priorityqueue,最后逐一出队即可。代码: public String frequencySort1(String s) { ...
package leetcode import ( "sort" ) func frequencySort(s string) string { if s == "" { return "" } sMap := map[byte]int{} cMap := map[int][]byte{} sb := []byte(s) for _, b := range sb { sMap[b]++ } for key, value := range sMap { cMap[value] = append(cMap[va...
classSolution {public:stringfrequencySort(strings) {stringres =""; vector<string> v(s.size() +1,""); unordered_map<char,int>m;for(charc : s) ++m[c];for(auto&a : m) { v[a.second].append(a.second, a.first); }for(inti = s.size(); i >0; --i) {if(!v[i].empty()...
[LeetCode] 451. Sort Characters By Frequency Given a strings, sort it in decreasing order based on the frequency of characters, and returnthe sorted string. Example 1: Input: s = "tree" Output: "eert" Explanation: 'e' appears twice while 'r' and 't' both appear once....
LeetCode451 Sort Characters By Frequency 题目: Given a string, sort it in decreasing order based on the frequency of characters. Example 1: Input: &...Leetcode451. Sort Characters By Frequency 给定一个字符串,请将字符串里的字符按照出现的频率降序排列。 示例 1: 输入: “tree” 输出: “...
Sort Characters By Frequency 2. Solution boolcompare(pair<char,int>&a,pair<char,int>&b){returna.second>b.second;}class Solution{public:stringfrequencySort(string s){map<char,int>stat;for(inti=0;i<s.length();i++){stat[s[i]]++;}vector<pair<char,int>>values;for(autoval:stat){values...