返回目錄 題目大意:在複平面上指定一個範圍,求這個範圍裡的高斯素數的密度(即 高斯素數個數/總座標數, 化為真分數) 。 題目類型:基礎類比題 / 數學背景題 題目分析: A Gaussian integer a + bi is a Gaussian prime if and only if either: ①One of a, b is zero and the other is a prime number of the form 4n + 3 (with n a nonnegative
原文連結:http://www.cnblogs.com/soroman/archive/2006/10/12/526163.html在http://blog.donews.com/wanderpoet/archive/2005/07/04/453608.aspx看到一篇關於Gimbal Lock的E文,解釋得挺清楚的,翻譯如下:Gimbal LockWhat's Gimbal Lock?Gimbal lock is the phenomenon of two rotational axis
Thedefinition in textbook:Thefirst letter, L for left to right or R for right to left, denotes the order inwhich to scan the source text.Thesecond letter denotes the derivation of the constructed parse tree. At eachstep in a left (L) derivation of a
hdu題目連結:http://acm.hdu.edu.cn/showproblem.php?pid=1238POJ題目連結:http://poj.org/problem?id=1226Problem DescriptionYou are given a number of case-sensitive strings of alphabetic characters, find the largest string X, such that either X, or its inverse
Problem Description哈利傳輸速率在魔法學校的必修課之一就是學習魔咒。據說魔法世界有100000種不同的魔咒,哈利很難全部記住,但是為了對抗強敵,他必須在危急時刻能夠調用任何一個需要的魔咒,所以他需要你的協助。給你一部魔咒詞典。當哈利聽到一個魔咒時,你的程式必須告訴他那個魔咒的功能;當哈利需要某個功能但不知道該用什麼魔咒時,你的程式要替他找到相應的魔咒。如果他要的魔咒不在詞典中,就輸出“what?”Input首先列出詞典中不超過100000條不同的魔咒詞條,每條格式為:[魔咒]