Amazon Interview Question

The first round was really simple, just some for-loop debugging and logical brain-teasers. The second was an actual coding test. Two questions, 70 minutes. The first was an easy one about trees. The second is difficult to explain. Given two arrays, perform some odd calculations with them. The biggest thing to look out for is that these questions were coded into word problems dealing with contrived ordering/shipping scenarios. I spent too much time trying to understand the word problem and didn't leave enough time for the actual problem.