Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. People use them as a speed contest, interview prep, company training, university coursework, practice problems, or to challenge each other.
You don't need a computer science background to participate - just a little programming knowledge and some problem solving skills will get you pretty far. Nor do you need a fancy computer; every problem has a solution that completes in at most 15 seconds on ten-year-old hardware.
What am I doing wrong? this is taking so long, on line 100, 500 after 20 mins, gonna run it in my bag during school, but why is it so slow? Snap! 7 - rc3 - Build Your Own Blocks Suggestions welcome!
Edit: srry meant to reply to topic not post
compile makes it faster right?, but i only use map in the setup, the real slow thing is when I am sdding each point to the list, and what does group by do? srry for replying to post by mistake