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#!python
#
# Perl Weekly Challenge 260
# Task 1
#
# See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-260>
#
import sys
# task implementation
# the return value will be printed
def task_1( args ):
nums = list( map( int, args ) )
bag = {}
for n in nums:
occurrencies = len( list( filter( lambda x: x == n, nums ) ) )
if not n in bag:
bag[ n ] = occurrencies
for o in bag.values():
if len( list( filter( lambda x: x == o, bag.values() ) ) ) > 1:
return 0
return 1
# invoke the main without the command itself
if __name__ == '__main__':
print( task_1( sys.argv[ 1: ] ) )
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