class Solution:
def uniqueOccurrences(self, arr: List[int]) -> bool:
d={}
for i in arr:
d[i]=d.get(i,0)+1
s=[d[i] for i in d]
return len(set(s))==len(s)
class Solution:
def uniqueOccurrences(self, arr: List[int]) -> bool:
d={}
for i in arr:
d[i]=d.get(i,0)+1
s=[d[i] for i in d]
return len(set(s))==len(s)
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