Given an array of integers `arr`, a lucky integer is an integer that has a frequency in the array equal to its value.

Return the largest lucky integer in the array. If there is no lucky integer return `-1`.

Example 1:

    Input: arr = [2,2,3,4]
    Output: 2
    Explanation: The only lucky number in the array is 2 because frequency[2] == 2.

Example 2:

    Input: arr = [1,2,2,3,3,3]
    Output: 3
    Explanation: 1, 2 and 3 are all lucky numbers, return the largest of them.

Example 3:

    Input: arr = [2,2,2,3,3]
    Output: -1
    Explanation: There are no lucky numbers in the array.

Constraints:

- `1 <= arr.length <= 500`
- `1 <= arr[i] <= 500`