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题目描述 You are teaching kindergarten! You wrote down the numbers from 1 to n, in order, on a whiteboard. When you weren’t paying attention, one of your 阅读全文
posted @ 2021-04-11 22:16
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题目描述 There is a group of people in an internet email message group. Messages are sent to all members of the group, and no two messages are sent at the 阅读全文
posted @ 2021-04-11 20:46
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题目描述 A group of students is taking a True/False exam. Each question is worth one point. You, as their teacher, want to make your students look as good 阅读全文
posted @ 2021-04-11 20:11
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