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Pasha loves to send strictly positive integers to his friends. Pasha cares about security, therefore when he wants to send an integer nn , he encrypts 阅读全文
posted @ 2020-07-20 00:23
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Acacius is studying strings theory. Today he came with the following problem. You are given a string ss of length nn consisting of lowercase English l 阅读全文
posted @ 2020-07-19 21:07
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1） 添加工具栏：右键点击菜单栏下方选择AddToolBar，然后将最下方的那些QAction拖到相应位置即可。右键工具栏可以添加分隔符。 2） 工具栏是可以上下左右停靠的。将其moveable属性取消勾选则变成不可移动的。allowedAreas为允许停靠的位置 3） 浮动窗口对应控件的Dock 阅读全文
posted @ 2020-07-19 16:58
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You are given a graph consisting of nn vertices and mm edges. It is not guaranteed that the given graph is connected. Some edges are already directed 阅读全文
posted @ 2020-07-19 01:46
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You are given a string s[1…n]s[1…n] consisting of lowercase Latin letters. It is guaranteed that n=2kn=2k for some integer k≥0k≥0 . The string s[1…n]s 阅读全文
posted @ 2020-07-18 17:09
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You are given an array aa consisting of nn integers. You have to find the length of the smallest (shortest) prefix of elements you need to erase from 阅读全文
posted @ 2020-07-18 16:59
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A permutation of length nn is a sequence of integers from 11 to nn of length nn containing each number exactly once. For example, [1][1] , [4,3,5,1,2] 阅读全文
posted @ 2020-07-18 16:48
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You are given three positive (i.e. strictly greater than zero) integers xx , yy and zz . Your task is to find positive integers aa , bb and cc such th 阅读全文
posted @ 2020-07-18 16:47
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Cuber QQ 长期在网络上与他人对线，一天，他发明了一台神奇的打字机。这台打字机只能处理由 a,b,X 构成的字符串。具体来说，打字机能够执行如下三种操作。 • 操作1：将任意一个 X 替换为 aX 。 • 操作2：将任意一个 X 替换为 aXbX 。 • 操作3：删除任意一个 X 。 打字机启 阅读全文
posted @ 2020-07-18 10:50
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Cuber QQ 迎来了他在华师大的最后一次期末考试。由于情况特殊，这场考试改为线上进行。 这是为毕业班特别准备的一次期末考试，命题老师为了让各位考生顺利毕业，设计了如下考试规则： 期末考试试卷共 n （1≤n≤1000）道选择题，由单选题和多选题组成。每道题的选项个数可能不同，多选题保证至少有一个 阅读全文
posted @ 2020-07-18 10:35
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