
ZOJ Problem Set  1879
A sequence of n > 0 integers is called a jolly jumper if the absolute values of the difference between successive elements take on all the values 1 through n1. For instance, 1 4 2 3 is a jolly jumper, because the absolutes differences are 3, 2, and 1 respectively. The definition implies that any sequence of a single integer is a jolly jumper. You are to write a program to determine whether or not each of a number of sequences is a jolly jumper.
For each line of input, generate a line of output saying "Jolly" or "Not jolly".
Source: University of Waterloo Local Contest 2000.09.30 