day 6 p1

data/day_6.txt

@@ -0,0 +1 @@
+1,4,2,4,5,3,5,2,2,5,2,1,2,4,5,2,3,5,4,3,3,1,2,3,2,1,4,4,2,1,1,4,1,4,4,4,1,4,2,4,3,3,3,3,1,1,5,4,2,5,2,4,2,2,3,1,2,5,2,4,1,5,3,5,1,4,5,3,1,4,5,2,4,5,3,1,2,5,1,2,2,1,5,5,1,1,1,4,2,5,4,3,3,1,3,4,1,1,2,2,2,5,4,4,3,2,1,1,1,1,2,5,1,3,2,1,4,4,2,1,4,5,2,5,5,3,3,1,3,2,2,3,4,1,3,1,5,4,2,5,2,4,1,5,1,4,5,1,2,4,4,1,4,1,4,4,2,2,5,4,1,3,1,3,3,1,5,1,5,5,5,1,3,1,2,1,4,5,4,4,1,3,3,1,4,1,2,1,3,2,1,5,5,3,3,1,3,5,1,5,3,5,3,1,1,1,1,4,4,3,5,5,1,1,2,2,5,5,3,2,5,2,3,4,4,1,1,2,2,4,3,5,5,1,1,5,4,3,1,3,1,2,4,4,4,4,1,4,3,4,1,3,5,5,5,1,3,5,4,3,1,3,5,4,4,3,4,2,1,1,3,1,1,2,4,1,4,1,1,1,5,5,1,3,4,1,1,5,4,4,2,2,1,3,4,4,2,2,2,3

src/day_6.jl

@@ -0,0 +1,45 @@
+include(joinpath(readchomp(`git rev-parse --show-toplevel`), "aoc.jl"))
+import .Aoc: @aoc
+using Pipe: @pipe
+
+
+function p1(input::Vector{String})
+	fish = @pipe split(input[1], ",") |> parse.(Int, _)
+	for d in 1:80
+		for f in 1:length(fish)
+			if fish[f] == 0
+				fish[f] = 6
+				push!(fish, 8)
+			else
+				fish[f] -= 1
+			end
+		end
+	end
+	return length(fish)
+end
+
+
+function p2(input::Vector{String})
+	fish = @pipe split(input[1], ",") |> parse.(Int, _)
+	state = Dict{Int, Int}()
+	fish = [3,4,3,1,2]
+
+	for f in fish
+		haskey(state, f) ? (state[f] += 1) : (state[f] = 1)
+	end
+	@info state
+	
+	for d in 1:256
+		next_day = Dict{Int, Int}([ [x, 0] for x in 0:8 ])
+		next_day[8] = get(state, 0, 0)
+		next_day[6] = get(state, 0, 0)
+		for i in 0:7
+			k = get(state, i+1, 0)
+			next_day[i] += k
+		end
+		state = next_day
+	end
+	return length(values(state))
+end
+
+@aoc(2021, 6)