[AtCoder] We have N switches with "on" and "off" state, and M bulbs. The switches are numbered 1 to N, and the bulbs are numbered 1 to M. - 题解

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题目信息
题号 P20411
标题 [AtCoder] We have N switches with "on" and "off" state, and M bulbs. The switches are numbered 1 to N, and the bulbs are numbered 1 to M.
难度 普及-
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