This one was a bit confusing. The wording of the problem is, “Work out the first ten digits of the sum of the following one-hundred 50-digit numbers.” I assumed that they wanted the ones place through the billionths place, but they wanted the first ten digits starting from the left side of the number. Continue reading
I just finished this one. My code is incredibly huge, over 100 lines. I’ve seen a few solutions that were far shorter than mine, but I found the answer. It took me a half hour to realize this, but for those who are trying to solve this and are stuck, don’t forget to check the correct diagonal directions. I was checking diagonally down from left to right, and then checking diagonally up from right to left, which is the exact same thing. That produced the exact same results, so I had to change one of those checks.
Here are a couple other hints, that most of you probably understood right away: Continue reading