Python 3 only

Problem 3. (Inverse Permutation) Write a program inverse_permutation.py that accepts a permutation of the integers 0 through n1 as n command-line arguments and writes its inverse. If the permutation is a list a, its inverse is the list b such that a[b[i]] = b[a[i]] = i. Be sure to check that the input is a valid permutation. If not, the program must exit with the message Not a permutation you can do this by calling the function sys.exit(msg), where msg is the message you want to write. $ python3 inverse_permutation.py 1 2 3 4 5

Not a permutation

$ python3 inverse_permutation.py 5 3 4 0 1 2

3 4 5 1 2 0

$ python3 inverse_permutation.py 0 1 2 3 4 5

0 1 2 3 4 5

$ python3 inverse_permutation.py 5 4 3 2 1 0

5 4 3 2 1 0