Piles of Boxes (15/15) - https://leetcode.com/discuss/interview-question/364618/Microsoft-or-OA-2019-or-Min-Steps-to-Make-Piles-Equal-Height

Lifting Weights (couldn't finish but dp solution should be straightforward) - https://stackoverflow.com/questions/36200214/knapsack-with-weight-only

Paint the ceiling (7/11 test cases passed, TLE for others)- Was posted already by someone