Golang | Leetcode Golang题解之第451题根据字符出现频率排序

题目：

题解：

func frequencySort(s string) string {cnt := map[byte]int{}maxFreq := 0for i := range s {cnt[s[i]]++maxFreq = max(maxFreq, cnt[s[i]])}buckets := make([][]byte, maxFreq+1)for ch, c := range cnt {buckets[c] = append(buckets[c], ch)}ans := make([]byte, 0, len(s))for i := maxFreq; i > 0; i-- {for _, ch := range buckets[i] {ans = append(ans, bytes.Repeat([]byte{ch}, i)...)}}return string(ans)
}func max(a, b int) int {if a > b {return a}return b
}