2598. Smallest Missing Non-negative Integer After Operations

You are given a 0-indexed integer array nums and an integer value. In one operation, you can add or subtract value from any element of nums. - For example, if nums = [1,2,3] and value = 2, you can choose to subtract value from nums[0] to make nums = [-1,2,3]. The MEX (minimum excluded) of an array is the smallest missing non-negative integer in it. - For example, the MEX of [-1,2,3] is 0 while