3 questions, 90 mins

1. Efficient Janitor - Efficient Janitor / Efficient Vineet (Hackerrank OA)
2. Cutting Metal Surplus - Audible | OA 2019 | Cutting Metal Surplus
3. Common Prefix Length -
   
   
   

Test cases passed:
Q1 - 2/8 (Java TLE)
Q2 - 15/15 (Or 13; not exact)
Q3 - 2/10 (Couldn't solve it properly)

Please share your ideas for the 3rd question.