5 Easy questions in 75 mins. You can just use brutal force to do each one. For the last question I thought about it too much and used a DP algo, but I could not finish it on time. After that I realized I can use a easy O(n^2) algo without exceeding the time limit, because n is less than 100.... Got rejection right after submitting the OA. I guess you need to get full points to pass it.