Well, this certainly sounds like the easiest problem ever, but it’s a little trickier than just adding the numbers.
Not by much though. This looks pretty messy in Java with all the type conversions, but the test cases had absolutely
huge values. I overflowed int, overflowed long, overflowed unsigned long, and ended up just using BigInteger which
got the job done.
Not much else to say about this. I think it’s only classified as a medium because of the extra tedium. It really
wasn’t very challenging though.