Amazon Software Development Engineer SDE interview questions

It was the amazon wow internship 2 months interview experience for prefinal year students. The selection rounds had a total of 2 rounds. The first round had 2 medium level coding questions to solve and the second round was the interview where the interviewer asked to explain questions related to dsa

The very first round of interview is the coding question, I prepare for a while by using leetcode, And I am assigned two questions that I haven't done before. These questions are around medium level.