浙大在线评测系统 1188 DNA Sorting

Problem: One measure of ``unsortedness'' in a sequence is the number of pairs of entries that ar

Problem: In millions of newspapers across the United States there is a word game called Jumble.

Problem: In 1949 the Indian mathematician D.R. Kaprekar discovered a class of numbers called sel

Problem: When printing out a document, normally the first page is printed first, then the second

Problem: Businesses like to have memorable telephone numbers. One way to make a telephone number

Problem: For each list of words, output a line with each word reversed without changing the or

Problem: A Strange Tree (S-tree) over the variable set Xn = {x1,x2,...,xn} is a binary tree repr

Problem: We all know that FatMouse doesn't speak English. But now he has to be prepared since ou

Problem: In a Lotto I have ever played, one has to select 6 numbers from the set {1,2,...,49}. A

Problem: Recently you must have experienced that when too many people use the BBS simultaneously