Description ACM has bought a new crane (crane -- jeřáb) . The crane consists of n segments of various lengths, connected by flexible joints. The end of the i-th segment is joined to the beginning

题目链接： HDU:http://acm.hdu.edu.cn/showproblem.php?pid=1988 ZOJ:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=1990 Problem Description The cook at the Frobbozz Magic Pancake House