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grundy数を初めて使ってみた Day 1: Game of Stones

Quiz https://www.hackerrank.com/contests/5-days-of-game-theory/challenges/a-game-of-stones/problem Submit https://www.hackerrank.com/contests/5-days-of-game-theory/challenges/a-game-of-stones/submissions/code/1314174009 grundy数とは https:…