Jolly Jumpers

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 n − 1. For instance, 1423 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. Input Each line of input contains an integer n ≤ 3000 followed by n integers representing the sequence. Output For each line of input, generate a line of output saying ‘Jolly’ or ‘Not jolly’. Sample Input 41423 5 1 4 2 -1 6 Sample Output Jolly Not jolly