1004. Max Consecutive Ones III

    func longestOnes(_ A: [Int], _ K: Int) -> Int {
        var left = 0
        var right = 0
        var zero = 0
        var res = 0

        while right < A.count{
            if A[right] == 0 {
                zero += 1
            }
            while zero > K{
                if A[i] == 0{
                    zero -= 1
                }
                left += 1
            }
            res = max(res, right - left + 1)
            right += 1
        }
        return res
    }