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1460. Make Two Arrays Equal by Reversing Subarrays

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.

 

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 subarray [2,4,1], arr becomes [1,4,2,3]
2- Reverse subarray [4,2], arr becomes [1,2,4,3]
3- Reverse subarray [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.

Example 2:

Input: target = [7], arr = [7]
Output: true
Explanation: arr is equal to target without any reverses.

Example 3:

Input: target = [3,7,9], arr = [3,7,11]
Output: false
Explanation: arr does not have value 9 and it can never be converted to target.

 

Constraints:

  • target.length == arr.length
  • 1 <= target.length <= 1000
  • 1 <= target[i] <= 1000
  • 1 <= arr[i] <= 1000

Solutions

  • class Solution {
    public boolean canBeEqual(int[] target, int[] arr) {
        Arrays.sort(target);
        Arrays.sort(arr);
        return Arrays.equals(target, arr);
    }
}

  • class Solution {
public:
    bool canBeEqual(vector<int>& target, vector<int>& arr) {
        sort(target.begin(), target.end());
        sort(arr.begin(), arr.end());
        return target == arr;
    }
};

  • class Solution:
    def canBeEqual(self, target: List[int], arr: List[int]) -> bool:
        target.sort()
        arr.sort()
        return target == arr


  • func canBeEqual(target []int, arr []int) bool {
	sort.Ints(target)
	sort.Ints(arr)
	for i, v := range target {
		if v != arr[i] {
			return false
		}
	}
	return true
}

  • function canBeEqual(target: number[], arr: number[]): boolean {
    target.sort((a, b) => a - b);
    arr.sort((a, b) => a - b);
    const n = arr.length;
    for (let i = 0; i < n; i++) {
        if (target[i] !== arr[i]) {
            return false;
        }
    }
    return true;
}


  • class Solution {
    /**
     * @param Integer[] $target
     * @param Integer[] $arr
     * @return Boolean
     */
    function canBeEqual($target, $arr) {
        sort($target);
        sort($arr);
        return $target === $arr;
    }
}


  • impl Solution {
    pub fn can_be_equal(mut target: Vec<i32>, mut arr: Vec<i32>) -> bool {
        target.sort();
        arr.sort();
        target == arr
    }
}

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