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#!/usr/bin/env python3
def unique_occurences(*elements):
'''
>>> unique_occurences(1,2,2,1,1,3)
1
>>> unique_occurences(1,2,3)
0
>>> unique_occurences(-2,0,1,-2,1,1,0,1,-2,9)
1
'''
if not all(isinstance(elem, int) for elem in elements):
raise ValueError("Input must consist of integers")
from collections import Counter
counts = Counter(elements)
occurences = counts.values()
if len(counts) == len(set(occurences)):
return 1
else:
return 0
if __name__ == "__main__":
import doctest
doctest.testmod()
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