After applying, I had to complete the Rembrandt profile along with a skill assessment which had 4 parts. The first 2 were mainly math, logic, and puzzles. The 3rd section was to determine outputs based on a language they give you. The 4th section was 4 LeetCode style problems.

Given length L and an array of 1-3 numbers, print out every number combination of length L with the following constraints:

• No 2 adjacent numbers can be the same.
• 4 can only be present as the first digit in the number.
• The digits in the given array also can't be in the number.