ZOJ3714JavaBeans

 #!/usr/bin/env python
 # encoding: utf-8
 t = int(raw_input())
 for i in range(t):
     n,k = [int(x) for x in raw_input().split(' ')]
     lst = [int(x) for x in raw_input().split(' ')]
     ans = max(sum((lst*2)[j:j+k]) for j in range(n))
     print ans

一个水题.给n,和k.然后求一个循环序列的连续k个数求和最大值.python6行..