Problem 42920. Find the inverse permutation

Created by Jens Kjærgaard Boldsen
Appears in Combinatorics III

Difficulty:Rate

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Given a permutation vector perm (a vector of n elements containing all the elements from 1 to n in some order), return the permutation vector invPerm such that perm(invPerm) is the a list of elements from 1 to n.

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Last Solution submitted on Jun 02, 2025

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Asif Newaz on 2 Jun 2025 at 18:48

you should add an example to better explain the question.
For others =>
if, perm = [3, 1, 4, 2]
invPerm = [2, 4, 1, 3] - that is the index of 1 to n.

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