Round 1:
1) minimum-value-to-get-positive-step-by-step-sum.
https://leetcode.com/problems/minimum-value-to-get-positive-step-by-step-sum/
2) Minimize sum of squares of adjacent elements difference.
https://www.geeksforgeeks.org/minimize-sum-of-squares-of-adjacent-elements-difference/
Round 2:
1) Longest common subsequence(DP)
https://leetcode.com/problems/longest-common-subsequence/
2) Find the remaining vertices of a square from two given vertices
https://www.geeksforgeeks.org/find-the-remaining-vertices-of-a-square-from-two-given-vertices/
Unfortunately, I did not qualify for round 3 :(