HackWithInfy• Prep

Number of Subarrays With AND Value of K

Difficulty

Hard

Acceptance Rate

35.0%

Problem Statement

Given an array of integers nums and an integer k, return the number of subarrays of nums where the bitwise AND of the elements of the subarray equals k.

Example 1:

Input: nums = [1,1,1], k = 1

Output: 6

Explanation:

All subarrays contain only 1's.

Example 2:

Input: nums = [1,1,2], k = 1

Output: 3

Explanation:

Subarrays having an AND value of 1 are: [1,1,2], [1,1,2], [1,1,2].

Example 3:

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

Output: 2

Explanation:

Subarrays having an AND value of 2 are: [1,2,3], [1,2,3].

Constraints:

1 <= nums.length <= 10⁵
0 <= nums[i], k <= 10⁹