摘要：
Schoolboy Vasya is interested in the problem of distinguishing prime numbers. He has decided to develop his own testing method for it. Unfortunately, 阅读全文
摘要：
Vasily is a college student who likes to keep everything in order. One of his hobbies is software. Yesterday he installed a new operating system Windo 阅读全文
摘要：
Albert is a well-known inventor. He’s the one who designed an electronic weather station that periodically track all kinds of weather parameters and r 阅读全文
摘要：
面值有1, 2, 5, 10, 20, 50, 100，输入n（n<=100），求凑成n的种数 阅读全文