每日一题 --- 713. 乘积小于 K 的子数组[力扣][Go]

func numSubarrayProductLessThanK(nums []int, k int) int {
    n := len(nums)
    r := 0
    ans := 0
    for r < n  {
        a := r
        sum := 1
        for a < n {
            sum *= nums[a]
            //fmt.Print(nums[a]," ")
            if sum >= k {
                break
            }
            a++
        }
        //fmt.Println()
        ans += a - r
        r ++
    }
    return ans
}