[스파르타] 99클럽 2기 코테스터디 31일차 TIL / leet 451

Leetcode: 451. Sort Characters By Frequency (링크)

 

451. Sort Characters By Frequency

 

class Solution:
    def frequencySort(self, s: str) -> str:
        ans = ''
        hash = defaultdict(int)
        for i in s:
            hash[i] += 1
        hash = sorted(hash.items(), key=lambda x: -x[1])
        for i in hash:
            ans += i[0] * int(i[1])
        return ans

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