aoc2021-abap VS adventofcode

I've created solutions for all days except day 19 in ABAP. Feel free to take a look at the whole repository. The code is standalone and doesn't require any DDIC types or classes. Just a local file on the application server to read the input from.

ABAP Github While I found an easy way to convert a binary number string to an int, ABAP doesn't allow bit operations on ints but only on variables with type x or xstring. To apply a NOT/XOR to the int, it has to be converted to type x, XORed and converted back to an int. Fortunately with the ABAP version in SAP NetWeaver 7.50 conversion can be done inline.

Github

Part one went fairly fast, but spent quite some time on getting part two right. I settled on the approach of just iterating over the grid and using a boolean to see if I had to count elements or not. However, I had some issues figuring out when to swap, this post by /u/rogual helped me figure it out. After that I lost quite some time on an error that only occurred with my input, not with the example input. It turned out that my loop (which I take form my p1 solution) didn't include the start node, which caused all sorts of counting issues.

[Language: Elixir] https://github.com/mathsaey/adventofcode/blob/master/lib/2023/4.ex