We have `n` chips, where the position of the `ith` chip is `position[i]`.

We need to move all the chips to the same position. In one step, we can change the position of the `ith` chip from `position[i]` to:

- `position[i] + 2` or `position[i] - 2` with `cost = 0`.
- `position[i] + 1` or `position[i] - 1` with `cost = 1`.

Return the minimum cost needed to move all the chips to the same position.

Example 1:

    Input: position = [1,2,3]
    Output: 1
    Explanation: First step: Move the chip at position 3 to position 1 with cost = 0.
    Second step: Move the chip at position 2 to position 1 with cost = 1.
    Total cost is 1.

Example 2:

    Input: position = [2,2,2,3,3]
    Output: 2
    Explanation: We can move the two chips at position  3 to position 2. Each move has cost = 1. The total cost = 2.

Example 3:

    Input: position = [1,1000000000]
    Output: 1

Constraints:

- `1 <= position.length <= 100`
- `1 <= position[i] <= 10^9`