35 lines
690 B
Plaintext
35 lines
690 B
Plaintext
|
Day 3 Notes
|
||
|
|
|
||
|
|
+--------+
|
||
|
|
| Part 1 |
|
||
|
|
+--------|
|
||
|
|
|
||
|
|
$ elixir day3part1.exs
|
||
|
|
Travelled (969, 323) and encountereed 270 trees
|
||
|
|
|
||
|
|
Thoughts:
|
||
|
|
|
||
|
|
Input repeats, so use Stream.cycle/2.
|
||
|
|
Need to keep track of the x-offset, pass it to Enum.at/2.
|
||
|
|
|
||
|
|
|
||
|
|
+--------+
|
||
|
|
| Part 2 |
|
||
|
|
+--------|
|
||
|
|
|
||
|
|
$ elixir day3part2.exs
|
||
|
|
2122848000
|
||
|
|
|
||
|
|
Thoughts:
|
||
|
|
|
||
|
|
Modify original answer to take x and y velocity.
|
||
|
|
Can just pass x velocity in as before.
|
||
|
|
Use Enum.take_every/2 to skip unneeded rows for y velocity.
|
||
|
|
|
||
|
|
+------------------+
|
||
|
|
| Overall Thoughts |
|
||
|
|
+------------------+
|
||
|
|
|
||
|
|
Pretty simple, because Stream.cycle/2 takes care of the tricky bit.
|
||
|
|
Thankfully I answered part 1 in a way that made part 2 just a small change to add Enum.take_every/2.
|