Top Answers

1. Efficiently find an integer not in a set of size 40, 400, or 4000
   10 votes
2. How can I place n circles randomly inside a rectangle without overlapping?
   5 votes
3. minimum time to change arrays to make sums of two arrays equal
   4 votes
4. Is there an O(n) algorithm to find the first missing number in an array?
   4 votes
5. Arrange array so adjacent has less space that gives minimum sum
   3 votes