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用红、黄、蓝三种颜色个一个2×n的长方形中每一个小方格随意染上一种

2025-03-31 17:29:09

推荐回答（2个）

回答1：

染色方案有九种：红红、蓝蓝、黄黄、红蓝、红黄、蓝红、蓝黄、黄红、黄蓝。因此，至少染10列，才能保证有两列是完全相同的。

回答2：

用红,黄,蓝三种颜色给一个2×n的长方形中每一个小方格随意染上了一种颜色。n至少为多少时，才能保证至少有2列染色方式一样

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