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class Solution:
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    def uniqueOccurrences(self, arr: List[int]) -> bool:
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        # defining dictionary
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        occ = dict()
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        # adding elements with their counts in dictionary
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        for element in arr:
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            if element not in occ:
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                occ[element] = 0
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            else:
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                occ[element] += 1
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        # list of count of elements
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        values = list(occ.values())
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        # Unique count
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        unique = set(values)
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        if len(values) == len(unique):
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            return True
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        else:
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            return False