! Copyright (c) 2007, 2008 Aaron Schaefer. ! See http://factorcode.org/license.txt for BSD license. USING: math.functions project-euler.common sequences ; IN: project-euler.016 ! http://projecteuler.net/index.php?section=problems&id=16 ! DESCRIPTION ! ----------- ! 2^15 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26. ! What is the sum of the digits of the number 2^1000? ! SOLUTION ! -------- : euler016 ( -- answer ) 2 1000 ^ number>digits sum ; ! [ euler016 ] 100 ave-time ! 0 ms ave run time - 0.67 SD (100 trials) SOLUTION: euler016