[LeetCode]#1460. Make Two Arrays Equal by Reversing Sub-arrays

Environment: Python 3.8

Key technique: .remove

Given two integer arrays of equal length target and arr.

In one step, you can select any non-empty sub-array of arr and reverse it. You are allowed to make any number of steps.

Return True if you can make arr equal to target, or False otherwise.

Example 1:

Input: target = [1,2,3,4], arr = [2,4,1,3]
Output: true
Explanation: You can follow the next steps to convert arr to target:
1- Reverse sub-array [2,4,1], arr becomes [1,4,2,3]
2- Reverse sub-array [4,2], arr becomes [1,2,4,3]
3- Reverse sub-array [4,3], arr becomes [1,2,3,4]
There are multiple ways to convert arr to target, this is not the only way to do so.

Analysis:

1. If arr [i] is in target, remove this element.
2. If new target length is 0, return True.

Solution:

class Solution:
    def canBeEqual(self, target, arr):
        for i in arr:
            if i in target:
                target.remove(i)
        if len(target)>0:
            return False
        else:
            return True

Submissions:

Reference:

https://leetcode.com/problems/make-two-arrays-equal-by-reversing-sub-arrays/discuss/1004037/Easy-Python-Solution