diff --git a/day18/part2.lua b/day18/part2.lua
index 7528750..e4587e4 100755
--- a/day18/part2.lua
+++ b/day18/part2.lua
@@ -76,13 +76,13 @@ function add(a, b)
 	return reduce(sum)
 end
 
-function reconstruct(number)
+function magnitude(number)
 	local function go(d, c)
-		local left, right
 		if number[c].d > d then
+			local left, right
 			left, c = go(d + 1, c)
 			right, c = go(d + 1, c)
-			return { left, right }, c
+			return 3 * left + 2 * right, c
 		else
 			return number[c].n, c + 1
 		end
@@ -90,33 +90,6 @@ function reconstruct(number)
 	return go(0, 1)
 end
 
-function printnumber(a)
-	local function go(a)
-		if type(a) == "number" then
-			io.write(tostring(a))
-		else
-			io.write("[")
-			go(a[1])
-			io.write(",")
-			go(a[2])
-			io.write("]")
-		end
-	end
-	go(reconstruct(a))
-	io.write("\n")
-end
-
-function magnitude(a)
-	local function go(a)
-		if type(a) == "number" then
-			return a
-		else
-			return 3 * go(a[1]) + 2 * go(a[2])
-		end
-	end
-	return go(reconstruct(a))
-end
-
 local numbers = {}
 for line in io.lines(arg[3]) do
 	table.insert(numbers, parse(line))