摘要：
The input contains N natural (i.e. positive integer) numbers ( N <= 10000 ). Each of that numbers is not greater than 15000. This numbers are not nece 阅读全文
摘要：
Given a number N, you are asked to count the number of integers between A and B inclusive which are relatively prime to N. Two integers are said to be 阅读全文
摘要：
Now you get a number N, and a M-integers set, you should find out how many integers which are small than N, that they can divided exactly by any integ 阅读全文