LeetCode Algorithm 451. 根据字符出现频率排序

451. 根据字符出现频率排序

Ideas

Python解法：用个计数器，然后遍历计数器把相应字符乘以出现次数拼接起来就可以了。

Code Python

from collections import Counter class Solution: def frequencySort(self, s: str) -> str: ans = '' counter = Counter(list(s)) for k, v in counter.most_common(): ans += k * v return ans if __name__ == '__main__': print(Solution().frequencySort(s="tree"))