[至急]Project Euler:#17Number letter countsコード入力出力解説

https://projecteuler.net/problem=17

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.

私の考え
a[i]: iを英単語として表記したときの文字数
出力: Σ[1≦i≦1000] a[i]
British usageとは?

No.2 ベストアンサー 回答者： cametan_42 回答日時： 2022/09/25 15:20

実装例:

https://www.ideone.com/q4jJxh

No.1 回答者： Tacosan 回答日時： 2022/09/25 03:09

その a[i] をどうやって求めるつもり?

あと「British usage」はたぶん「and を入れる」というルールだと思うぞ.