摘要：
Some people believe that there are three cycles in a person's life that start the day he or she is born. These three cycles are the physical, emotiona 阅读全文
摘要：
People are different. Some secretly read magazines full of interesting girls' pictures, others create an A-bomb in their cellar, others like using Win 阅读全文
摘要：
This problem is based on an exercise of David Hilbert, who pedagogically suggested that one study the theory of 4n+1 numbers. Here, we do only a bit o 阅读全文
摘要：
Your task in this problem is to determine the number of divisors of Cnk. Just for fun -- or do you need any special reason for such a useful computati 阅读全文