1207. Unique Number of Occurrences.py

class Solution:
    def uniqueOccurrences(self, arr: List[int]) -> bool:
#         dict_ = {}
#         for i in arr:
#             dict_[i] = dict_.get(i, 0) + 1
#         temp = {}
#         for _, i in dict_.items():
#             if i not in temp: temp[i] = 0
#             else: return False
#         return True

        temp = Counter(arr).values()
        return len(set(temp)) == len(temp)