| Problem: 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. C’est le seul des exercices (parmi ceux que je publie ici) que je n’ai pas réussi à faire seul, pour des raisons uniquement linguistiques, je l’espère. Je m’inspire donc ici de deux solutions disponibles sur le forum du « Project Euler ». |