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? 訳 2^15 = 32768 であり，その各桁の数の和は 3 + 2 + 7 + 6 + 8 = 26 である．では，2^1000の各桁の和を求めよ． Haskell シンプ…

Starting in the top left corner of a grid, there are 6 routes (without backtracking) to the bottom right corner.(figure is omitted)How many routes are there through a grid? 訳 の格子の左上隅からスタートして，右下隅に，逆戻りしないで到着す…