advent_of_code_2022

commit 62beb1240c46404e269d0578a6ca4d317cf98c5d
parent 8003346de8b4da4cf289608d54f5d2c2e6fa9637
Author: Eamon Caddigan <eamon.caddigan@gmail.com>
Date:   Mon,  5 Dec 2022 21:47:07 -0800

Solution to day 6, part 2.

Rewrote part 1 solution so there would be less duplicated code.

Diffstat:
M
src/day_6.jl
 | 
15
+++++++++------

1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/src/day_6.jl b/src/day_6.jl
@@ -5,19 +5,22 @@ using AdventOfCode
 example = ["mjqjpqmgbljsphdztnvjfqwrcgsmlb"]
 input = readlines("data/day_6.txt")
 
-function part_1(input)
-    transmission = first(input)
-    for i = 4:lastindex(transmission)
-        if allunique(transmission[i-3:i])
+function findmarker(transmission, markerlength)
+    for i = markerlength:lastindex(transmission)
+        if allunique(transmission[i-markerlength+1:i])
             return i
         end
     end
 end
+
+function part_1(input)
+    findmarker(first(input), 4)
+end
 @assert part_1(example) == 7
 @info part_1(input)
 
 function part_2(input)
-    nothing
+    findmarker(first(input), 14)
 end
-@assert part_2(example) == nothing
+@assert part_2(example) == 19
 @info part_2(input)