README.md

713. Subarray Product Less Than K

Your are given an array of positive integers nums.

Count and print the number of (contiguous) subarrays where the product of all the elements in the subarray is less than k.

Example 1:

Input: nums = [10, 5, 2, 6], k = 100 Output: 8 Explanation: The 8 subarrays that have product less than 100 are: [10], [5], [2], [6], [10, 5], [5, 2], [2, 6], [5, 2, 6]. Note that [10, 5, 2] is not included as the product of 100 is not strictly less than k. 

Note:

• 0 < nums.length <= 50000.
• 0 < nums[i] < 1000.
• 0 <= k < 10^6.

Solutions (Ruby)

1. Two Pointers

# @param {Integer[]} nums# @param {Integer} k# @return {Integer}defnum_subarray_product_less_than_k(nums,k)return0ifk < 2product=1i=0ret=0(0...nums.size).eachdo |j| product *= nums[j]whileproduct >= kproduct /= nums[i]i += 1endret += j - i + 1endretend

Solutions (Rust)

1. Two Pointers

implSolution{pubfnnum_subarray_product_less_than_k(nums:Vec<i32>,k:i32) -> i32{if k < 2{return0;}letmut product = 1;letmut i = 0;letmut ret = 0;for j in0..nums.len(){ product *= nums[j];while product >= k { product /= nums[i]; i += 1;} ret += j - i + 1;} ret asi32}}