152. Maximum Product Subarray

    func maxProduct(_ nums: [Int]) -> Int {
        var minSub = 1
        var maxSub = 1
        var res = Int.min
        for (index, n) in nums.enumerated(){
            let possible1 = n * minSub
            let possible2 = n * maxSub
            minSub = min(n , possible1, possible2)
            maxSub = max(n , possible1, possible2)
            res = max(res , maxSub)
        }
        return res
    }