2020年8月12日网易互娱笔试题-白红宇

2020年8月12日网易互娱笔试题

阅读量：219 次

发布时间：2019-03-01

本文共 213 字，大约阅读时间需要 1 分钟。

147 | 258 | 369

万 | 饼 | 条

上述9张数字牌，配合（万 | 饼 | 条），从中随便丢掉2张，剩下的牌，是可以胡牌的。

现在，输入N个7张牌，判断能不能胡牌。

这里如果简单粗暴的枚举讨论，会陷入的细节中。

比较好的思路是利用数学剩余类

1-4-7 mod3 = 1

2-5-8 mod3 = 2

3-6-9 mod3 = 0

每个剩余类只能对应一个字母，每个剩余类至少要有一个字母，这样就可以屏蔽具体细节。

转载地址：http://vkqv.baihongyu.com/

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