Package g2401_2500.s2447_number_of_subarrays_with_gcd_equal_to_k

Class Solution

java.lang.Object
g2401_2500.s2447_number_of_subarrays_with_gcd_equal_to_k.Solution
public class Solution extends Object
2447 - Number of Subarrays With GCD Equal to K.

Medium

Given an integer array nums and an integer k, return the number of subarrays of nums where the greatest common divisor of the subarray’s elements is k.

A subarray is a contiguous non-empty sequence of elements within an array.

The greatest common divisor of an array is the largest integer that evenly divides all the array elements.

Example 1:

Input: nums = [9,3,1,2,6,3], k = 3

Output: 4

Explanation: The subarrays of nums where 3 is the greatest common divisor of all the subarray’s elements are:

  • [9, 3 ,1,2,6,3]

  • [9,3,1,2,6, 3 ]

  • [ 9,3 ,1,2,6,3]

  • [9,3,1,2, 6,3 ]

Example 2:

Input: nums = [4], k = 7

Output: 0

Explanation: There are no subarrays of nums where 7 is the greatest common divisor of all the subarray’s elements.

Constraints:

  • 1 <= nums.length <= 1000
  • 1 <= nums[i], k <= 109

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • subarrayGCD

      public int subarrayGCD(int[] nums, int k)