摘要:
You are encountered with a traditional problem concerning the sums of powers. Given two integers nn and kk. Let f(i)=ikf(i)=ik, pleas... 阅读全文
摘要:
Welcome to HDU to take part in the second CCPC girls’ competition! A new automatic judge system is used for this competition. During ... 阅读全文
摘要:
Do you know what is called ``Coprime Sequence''? That is a sequence consists of nnpositive integers, and the GCD (Greatest Common Divi... 阅读全文