Maya Calendar

Description

During his last sabbatical, professor M. A. Ya made a surprising discovery about the old Maya calendar. From an old knotted message, professor discovered that the Maya civilization used a 365 day long year, called Haab, which had 19 months. Each of the first 18 months was 20 days long, and the names of the months were pop, no, zip, zotz, tzec, xul, yoxkin, mol, chen, yax, zac, ceh, mac, kankin, muan, pax, koyab, cumhu. Instead of having names, the days of the months were denoted by numbers starting from 0 to 19. The last month of Haab was called uayet and had 5 days denoted by numbers 0, 1, 2, 3, 4. The Maya believed that this month was unlucky, the court of justice was not in session, the trade stopped, people did not even sweep the floor.

DNA Sorting

Description

One measure of “unsortedness’’ in a sequence is the number of pairs of entries that are out of order with respect to each other. For instance, in the letter sequence “DAABEC’’, this measure is 5, since D is greater than four letters to its right and E is greater than one letter to its right. This measure is called the number of inversions in the sequence. The sequence “AACEDGG’’ has only one inversion (E and D)—-it is nearly sorted—-while the sequence “”ZWQM’’ has 6 inversions (it is as unsorted as can be—-exactly the reverse of sorted).

You are responsible for cataloguing a sequence of DNA strings (sequences containing only the four letters A, C, G, and T). However, you want to catalog them, not in alphabetical order, but rather in order of “sortedness’’, from “most sorted’’ to “least sorted’’. All the strings are of the same length.

Biorhythms

Description:

Some people believe that there are three cycles in a person’s life that start the day he or she is born. These three cycles are the physical, emotional, and intellectual cycles, and they have periods of lengths 23, 28, and 33 days, respectively. There is one peak in each period of a cycle. At the peak of a cycle, a person performs at his or her best in the corresponding field (physical, emotional or mental). For example, if it is the mental curve, thought processes will be sharper and concentration will be easier.

487-3279

Description:

Businesses like to have memorable telephone numbers. One way to make a telephone number memorable is to have it spell a memorable word or phrase. For example, you can call the University of Waterloo by dialing the memorable TUT-GLOP. Sometimes only part of the number is used to spell a word. When you get back to your hotel tonight you can order a pizza from Gino’s by dialing 310-GINO. Another way to make a telephone number memorable is to group the digits in a memorable way. You could order your pizza from Pizza Hut by calling their ``three tens’’ number 3-10-10-10.

Title: Exponentiation

Description:

Problems involving the computation of exact values of very large magnitude and precision are common. For example, the computation of the national debt is a taxing experience for many computer systems.

This problem requires that you write a program to compute the exact value of Rn where R is a real number ( 0.0 < R < 99.999 ) and n is an integer such that 0 < n <= 25.

第三章 函数的增长

第二章 算法基础

第一章 算法在计算中的作用

8月26日更新

——部分文本更正，链接部分更正

8月25日更新

——校园网及翼讯网络资费与带宽

关于本文

看到很多新生对于西电丰富的网络资源几乎没有什么了解，而且很多老腊肉对西电的网络资源虽有所了解但是不会最大化使用，有所感慨。就写了这写东西，希望对大家有所帮助。

当然本人水平有限，如果有什么错误或者疏漏，欢迎在博客下方评论区评论。

本文主要包括：校园网及翼讯、学生邮箱、西电睿思及其他PT站，和其他有帮助的网站

操作系统默认为Windows 10

Title: I Think I Need a Houseboat

Description

Fred Mapper is considering purchasing some land in Louisiana to build his house on. In the process of investigating the land, he learned that the state of Louisiana is actually shrinking by 50 square miles each year, due to erosion caused by the Mississippi River. Since Fred is hoping to live in this house the rest of his life, he needs to know if his land is going to be lost to erosion. After doing more research, Fred has learned that the land that is being lost forms a semicircle. This semicircle is part of a circle centered at (0,0), with the line that bisects the circle being the X axis. Locations below the X axis are in the water. The semicircle has an area of 0 at the beginning of year 1. (Semicircle illustrated in the Figure.)