P2953 [USACO09OPEN] Cow Digit Game S

题目描述

Bessie is playing a number game against Farmer John, and she wants you to help her achieve victory. Game i starts with an integer N\_i (1

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说明/提示

For the first game, Bessie simply takes the number 9 and wins. For the second game, Bessie must take 1 (since she cannot take 0), and then FJ can win by taking 9.