摘要：
There are n n apples on a tree, numbered from 1 1 to n n . Count the number of ways to pick at most m m apples. InputThe first line of the input conta 阅读全文
摘要：
题目网站： http://acm.hdu.edu.cn/listproblem.php?vol=11 输入输出的对比： HDU2000： HDU2001: HDU1001： HDU2002： HDU2003： HDU2010: 2008: 阅读全文
摘要：
Yellowstar likes integers so much that he listed all positive integers in ascending order,but he hates those numbers which can be written as a^b (a, b 阅读全文
摘要：
Tom owns a company and he is the boss. There are n staffs which are numbered from 1 to n in this company, and every staff has a ability. Now, Tom is g 阅读全文