Given an integer array `nums` and an integer `k`, return `true` if `nums` has a continuous subarray of size at least two whose elements sum up to a multiple of `k`, or `false` otherwise.

An integer `x` is a multiple of `k` if there exists an integer `n` such that `x = n * k`. `0` is always a multiple of `k`.

Example 1:

    Input: nums = [23,2,4,6,7], k = 6
    Output: true
    Explanation: [2, 4] is a continuous subarray of size 2 whose elements sum up to 6.

Example 2:

    Input: nums = [23,2,6,4,7], k = 6
    Output: true
    Explanation: [23, 2, 6, 4, 7] is an continuous subarray of size 5 whose elements sum up to 42.
    42 is a multiple of 6 because 42 = 7 * 6 and 7 is an integer.

Example 3:

    Input: nums = [23,2,6,4,7], k = 13
    Output: false

Constraints:

- `1 <= nums.length <= 105`
- `0 <= nums[i] <= 109`
- `0 <= sum(nums[i]) <= 231 - 1`
- `1 <= k <= 231 - 1`