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题目 In this term, Alice took nn courses. Now, she has finished all final exams, and she will get her grades in the following nn days. On the i-th day, 阅读全文
posted @ 2020-12-27 01:07
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题目 a 题意 给出n个不同的数，如果这n个数有四个异或起来等于0，就是YES，如果一组都没有就是NO。 思路 考虑 a ^ b = c , 每次把两两异或后的值记录为1，如果有一个数记录了2次，即有两组数异或起来相等，由于这n个数都是不同的数，所以不可能存在ab=c && ad=c 的情况，所以必 阅读全文
posted @ 2020-12-27 01:06
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2020 is a special integer, it's formed of two same integers (20 and 20). We call a number is a good number, if and only if it can be formed of two sam 阅读全文
posted @ 2020-12-27 01:04
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题目 As a world-famous traveler, Prof. Pang's research interest is to travel as many places as possible in his life. We have a segment {[0, n]}[0,n]. Th 阅读全文
posted @ 2020-12-27 01:03
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题目 Your git project (you don't need to be familiar with git to solve this problem) has some files that should be ignored from synchronizing. You need 阅读全文
posted @ 2020-12-27 01:02
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题目 A mine-sweeper map X can be expressed as an n\times mn×m grid. Each cell of the grid is either a mine cell or a non-mine cell. A mine cell has no n 阅读全文
posted @ 2020-12-27 01:01
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题目 In mathematics, the Fibonacci numbers, commonly denoted as f_nf n , is a sequence such that each number is the sum of the two preceding numbers, 阅读全文
posted @ 2020-12-27 01:00
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