Given an array `arr` of integers, check if there exists two integers `N` and `M` such that `N` is the double of `M` ( i.e. `N = 2 * M`).

More formally check if there exists two indices `i` and `j` such that :

- `i != j`
- `0 <= i, j < arr.length`
- `arr[i] == 2 * arr[j]`

Example 1:

    Input: arr = [10,2,5,3]
    Output: true
    Explanation: N = 10 is the double of M = 5,that is, 10 = 2 * 5.

Example 2:

    Input: arr = [7,1,14,11]
    Output: true
    Explanation: N = 14 is the double of M = 7,that is, 14 = 2 * 7.

Example 3:

    Input: arr = [3,1,7,11]
    Output: false
    Explanation: In this case does not exist N and M, such that N = 2 * M.

Constraints:

- `2 <= arr.length <= 500`
- `-10^3 <= arr[i] <= 10^3`