文章作者：Tyan
博客：noahsnail.com | CSDN | 简书
Unique Number of Occurrences
解析：Version 1，先统计数字数量，再用map或set判断数量是否重复。
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] = 1
else:
return False
return True
Given an array of integers arr, write a function that ret...
文章作者：Tyan博客：noahsnail.com[http://noahsnail.com] | CSDN[ht...
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本文标题：Leetcode 1207. Unique Number of
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