Problem Description
You are given two integer arrays of equal length target and arr. In one step, you can select any non-empty subarray 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.
Key Insights
- The order of elements can be altered by reversing subarrays.
- The problem can be reduced to checking if both arrays contain the same elements in any order.
- If both arrays have the same frequency of each element, then it is possible to convert arr to target.
Space and Time Complexity
Time Complexity: O(n)
Space Complexity: O(n)
Solution
The solution involves checking if both arrays are permutations of each other. This can be efficiently done using a frequency count of the elements in both arrays. We can utilize a hash map (or dictionary) to count occurrences of each element. If the counts match for both arrays, then arr can be transformed into target through a series of subarray reversals.