Watch 10 video solutions for Convert an Array Into a 2D Array With Conditions, a medium level problem involving Array, Hash Table. This walkthrough by NeetCodeIO has 16,153 views views. Want to try solving it yourself? Practice on FleetCode or read the detailed text solution.
You are given an integer array nums. You need to create a 2D array from nums satisfying the following conditions:
nums.Return the resulting array. If there are multiple answers, return any of them.
Note that the 2D array can have a different number of elements on each row.
Example 1:
Input: nums = [1,3,4,1,2,3,1] Output: [[1,3,4,2],[1,3],[1]] Explanation: We can create a 2D array that contains the following rows: - 1,3,4,2 - 1,3 - 1 All elements of nums were used, and each row of the 2D array contains distinct integers, so it is a valid answer. It can be shown that we cannot have less than 3 rows in a valid array.
Example 2:
Input: nums = [1,2,3,4] Output: [[4,3,2,1]] Explanation: All elements of the array are distinct, so we can keep all of them in the first row of the 2D array.
Constraints:
1 <= nums.length <= 2001 <= nums[i] <= nums.length