LeetCode 760. Find Anagram Mappings

Description

https://leetcode.com/problems/find-anagram-mappings/

Given two lists Aand B, and B is an anagram of AB is an anagram of A means B is made by randomizing the order of the elements in A.

We want to find an index mapping P, from A to B. A mapping P[i] = j means the ith element in A appears in B at index j.

These lists A and B may contain duplicates. If there are multiple answers, output any of them.

For example, given

A = [12, 28, 46, 32, 50]
B = [50, 12, 32, 46, 28]

We should return

[1, 4, 3, 2, 0]

as P[0] = 1 because the 0th element of A appears at B[1], and P[1] = 4 because the 1st element of A appears at B[4], and so on.

Note:

  1. A, B have equal lengths in range [1, 100].
  2. A[i], B[i] are integers in range [0, 10^5].

Explanation

Find A’s numbers’ indices in B.

Python Solution

class Solution:
    def anagramMappings(self, A: List[int], B: List[int]) -> List[int]:
        results = []
        
        for number in A:
            results.append(B.index(number))
        
        return results
  • Time Complexity: O(N)
  • Space Complexity: O(N)

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