#3692
Majority Frequency Characters
easy · 67.1% accepted · 51 likes · top 73%
hash table · string · counting
Description
You are given a string s consisting of lowercase English letters.
The frequency group for a value k is the set of characters that appear exactly k times in s.
The majority frequency group is the frequency group that contains the largest number of distinct characters.
Return a string containing all characters in the majority frequency group, in any order. If two or more frequency groups tie for that largest size, pick the group whose frequency k is larger.
Solution