1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22

// @Title: 乘积小于K的子数组 (Subarray Product Less Than K)
// @Author: 15816537946@163.com
// @Date: 2022-03-19 00:38:44
// @Runtime: 64 ms
// @Memory: 7.2 MB
func numSubarrayProductLessThanK(nums []int, k int) int {
    lo, hi, product :=0,0, 1
    var ret int 
    for hi < len(nums) {
        product *= nums[hi]
        for lo <= hi && product >= k {
            product/= nums[lo]
            lo++
        }
        if lo <= hi {
            ret += hi-lo+1
        }
        hi++
    }

    return ret
}