• This week’s missions: Permutation Index and Reversed Permutation Index


Hi, guys!

Since Python 2 has almost run its course, we’ve been kinda curious to ask. What Python version you’ve used for your first ‘hello world’ application?

Test yourself and have fun with the new missions created by kurosawa4434:

The first mission is called the “Permutation Index” and here you need to calculate the permutation index of a given tuple of integers.

assert permutation_index((2, 0, 1)) == 5
assert permutation_index((2, 1, 3, 0, 4, 5)) == 271

The second is the “Reversed Permutation Index” where your task is to calculate one of the permutations.

assert tuple(reversed_permutation_index(3, 5)) == (2, 0, 1)
assert tuple(reversed_permutation_index(6, 271)) == (2, 1, 3, 0, 4, 5)
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The users who’ve made the TOP 3 this month are flpo, colinmcnicholl, and HeNeArKr. You are doing great, guys! Keep on coding!

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