3434: Maximum Frequency After Subarray Operation

Problem Statement

You are given an array nums of length n. You are also given an integer k.

You perform the following operation on nums once:

  • Select a subarray nums[i..j] where 0 <= i <= j <= n - 1.
  • Select an integer x and add x to all the elements in nums[i..j].

Find the maximum frequency of the value k after the operation.

Example 1:

Input: nums = [1,2,3,4,5,6], k = 1

Output: 2

Explanation:

After adding -5 to nums[2..5], 1 has a frequency of 2 in [1, 2, -2, -1, 0, 1].

Example 2:

Input: nums = [10,2,3,4,5,5,4,3,2,2], k = 10

Output: 4

Explanation:

After adding 8 to nums[1..9], 10 has a frequency of 4 in [10, 10, 11, 12, 13, 13, 12, 11, 10, 10].

Constraints:

  • 1 <= n == nums.length <= 105
  • 1 <= nums[i] <= 50
  • 1 <= k <= 50

Code Solution