1부터 1000까지를 영어로 썼을 때, 전부 다 쓰려면 영어 몇 글자가 필요한가?
If the numbers 1 to 5 are written out in words: one, two, three,
four, five, then there are 3 + 3 + 5 + 4 + 4 = 19 letters used in total.
If all the numbers from 1 to 1000 (one thousand) inclusive were written out in words, how many letters would be used?
NOTE:
Do not count spaces or hyphens. For
example, 342 (three hundred and forty-two) contains 23 letters and 115
(one hundred and fifteen) contains 20 letters. The use of “and” when
writing out numbers is in compliance with British usage.
원문 : http://projecteuler.net/index.php?section=problems&id=17
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