Day5

Your submarine has to navigate around hydrothermal vents. To avoid the most dangerous areas, you need to determine the number of points where at least two lines overlap.

Day8

The input is a list of segment links that are not identify. You need to figure out the numbers and then figure out the sum.

Listing the segment codes and then linking them to the right spot in the display.

Solving some numbers, the whole solving without the 4 number display takes 5m 40s. It would take more than 20m with it!

Day9

Find smoke pockets from a heightmap of the floor.

Easy to render with the grid renderer I made. It takes an array and you can set some delegate that will call each character to get its color.

Day13

To use the submarine thermal camera you need to figure out the code in the manual. It’s a serie of points and fold instructions, that when applied will result in letters.