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题目地址 A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in t... 阅读全文
posted @ 2019-12-26 15:12
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题目地址 A long-distance telephone company charges its customers by the following rules: Making a long-distance call costs a certai... 阅读全文
posted @ 2019-12-26 15:12
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题目地址 Suppose a bank has K windows open for service. There is a yellow line in front of the windows which devides the waiting ar... 阅读全文
posted @ 2019-12-26 15:11
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题目地址 There is a public bike service in Hangzhou City which provides great convenience to the tourists from all over the world. ... 阅读全文
posted @ 2019-12-26 15:11
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题目地址 A number that will be the same when it is written forwards or backwards is known as a Palindromic Number. For example, 123... 阅读全文
posted @ 2019-12-26 15:09
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题目地址 Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal seque... 阅读全文
posted @ 2019-12-26 15:09
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题目地址 A graph which is connected and acyclic can be considered a tree. The height of the tree depends on the selected root. Now ... 阅读全文
posted @ 2019-12-26 15:08
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题目地址 A Digital Library contains millions of books, stored according to their titles, authors, key words of their abstracts, pub... 阅读全文
posted @ 2019-12-26 15:08
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题目地址 Notice that the number 123456789 is a 9-digit number consisting exactly the numbers from 1 to 9, with no duplication. Doub... 阅读全文
posted @ 2019-12-26 15:07
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题目地址 A number that will be the same when it is written forwards or backwards is known as a Palindromic Number. For example, 12... 阅读全文
posted @ 2019-12-26 15:07
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