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#!python
#
# Perl Weekly Challenge 261
# Task 2
#
# See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-261>
#
import sys
# task implementation
# the return value will be printed
def task_2( args ):
start = int( args[ 0 ] )
nums = args[ 1: ]
while len( list( filter( lambda x: x == str( start ), nums ) ) ) > 0:
start *= 2
return start
# invoke the main without the command itself
if __name__ == '__main__':
print( task_2( sys.argv[ 1: ] ) )
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