Leetcode 1207. Unique Number of Occurrences

文章作者：Tyan
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1. Description

2. Solution

**解析：**Version 1，先统计数字数量，再用map或set判断数量是否重复。

• Version 1

class Solution:def uniqueOccurrences(self, arr: List[int]) -> bool:stat = collections.Counter(arr)temp = {
    }for value in stat.values():if value not in temp:temp[value] = 1else:return Falsereturn True

Reference

1. https://leetcode.com/problems/unique-number-of-occurrences/