原创 f91
Background McCarthy is a famous theorician of computer science. In his work, he defined a recursive function, called f
2020-06-21 03:32:12
原创 什麼是GPA，應如何計算？
GPA英語全稱是grade point average，意思就是平均分，美國的GPA滿分是4分，即A=4，B=3，C=2， D=1.GPA 的精確度往往達到小數點後1到2位，如：3.0，3.45。GPA的計算一般是將每門課程的學分乘以 學
2020-06-21 03:32:12
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原创 Rotten Ropes
Suppose we have n ropes of equal length and we want to use them to lift some heavy object. A tear-off weight t is asso
2020-06-21 03:32:12
原创 Beavergnaw
When chomping a tree the beaver cuts a very specific shape out of the tree trunk. What is left in the tree trunk looks
2020-06-21 03:32:12
原创 OpenGL入門學習筆記一
OpenGL學習第一課 第一步，選擇一個編譯環境現在Windows系統的主流編譯環境有Visual Studio，Broland C++ Builder，Dev-C++等，它們都是支持OpenGL的。但這裏我選擇Visual Studio
2020-06-21 03:32:12
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原创 Goldbach's Conjecture
In 1742, Christian Goldbach, a German amateur mathematician, sent a letter to Leonhard Euler in which he made the follo
2020-02-24 22:15:42
原创 Currency Exchange
When Issac Bernand Miller takes a trip to another country, say to France, he exchanges his US dollars for French franc
2020-02-24 22:15:42
原创 Error Correction
A boolean matrix has the parity property when each row and each column has an even sum, i.e. contains an even number of
2020-02-24 22:15:42
原创 Parencodings
Let S = s1 s2 ... s2n be a well-formed string of parentheses. S can be encoded in two different ways: By an intege
2020-02-24 22:15:42
原创 Niven Numbers
A Niven number is a number such that the sum of its digits divides itself. For example, 111 is a Niven number becau
2020-02-24 22:15:42
原创 【分享】優秀外國英文網站
【分享】優秀外國英文網站 1 、英國《經濟學家》 http://www.economist.com ， 2 、美聯社 http://wire.ap.org/GoToAP.cgi 3 、英國 BBC http://news.bbc.c
2020-02-24 22:15:42
原创 提高英語聽力的細節問題
提高英語聽力的細節問題 在進行系統的聽力訓練時，學習者僅僅理解了聽力內容的大概是遠遠不夠的，對於文章的諸多細節，比如一些重要的 數據，年代，各種史實等，也要儘量準確無誤地聽出，這就需要通過反覆精聽來實現。所以科學系統的精聽訓練對學習者來說
2020-02-24 22:15:42
原创 平衡二叉樹的調整方法
平衡二叉樹是在構造二叉排序樹的過程中，每當插入一個新結點時，首先檢查是否因插入新結點而破壞了二叉排序樹的平衡性，若是，則找出其中的最小不平衡子樹，在保
2020-02-24 22:15:42
原创 A DP Problem Asia - Tehran 2003
In this problem, you are to solve a very easy linear equation with only one variable x with no parentheses! An exampl
2020-02-24 22:15:42
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