You are given an array `rectangles` where `rectangles[i] = [li, wi]` represents the `ith` rectangle of length `li` and width `wi`.

You can cut the `ith` rectangle to form a square with a side length of `k` if both `k <= li` and `k <= wi`. For example, if you have a rectangle `[4,6]`, you can cut it to get a square with a side length of at most `4`.

Let `maxLen` be the side length of the largest square you can obtain from any of the given rectangles.

Return the number of rectangles that can make a square with a side length of `maxLen`.

Example 1:

    Input: rectangles = [[5,8],[3,9],[5,12],[16,5]]

    Output: 3

    Explanation: The largest squares you can get from each rectangle are of lengths [5,3,5,5].

    The largest possible square is of length 5, and you can get it out of 3 rectangles.

Example 2:

    Input: rectangles = [[2,3],[3,7],[4,3],[3,7]]

    Output: 3

Constraints:

- `1 <= rectangles.length <= 1000`
- `rectangles[i].length == 2`
- `1 <= li, wi <= 109`
- `li != wi`