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Zhejiang University has 40000 students and provides 2500 courses. Now given the student name lists of all ... 阅读全文
posted @ 2019-10-14 23:25
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A number that will be the same when it is written forwards or backwards is known as a Palindromic Number. ... 阅读全文
posted @ 2019-10-14 22:54
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Notice that the number 123456789 is a 9-digit number consisting exactly the numbers from 1 to 9, with no d... 阅读全文
posted @ 2019-10-14 20:04
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