We have two special characters:

- The first character can be represented by one bit `0`.
- The second character can be represented by two bits (`10` or `11`).

Given a binary array `bits` that ends with `0`, return `true` if the last character must be a one-bit character.

Example 1:

    Input: bits = [1,0,0]
    Output: true
    Explanation: The only way to decode it is two-bit character and one-bit character.
    So the last character is one-bit character.

Example 2:

    Input: bits = [1,1,1,0]
    Output: false
    Explanation: The only way to decode it is two-bit character and two-bit character.
    So the last character is not one-bit character.

Constraints:

- `1 <= bits.length <= 1000`
- `bits[i]` is either `0` or `1`.