diff --git a/day24/part1.lua b/day24/part1.lua
index 455d8be..01a2ee6 100755
--- a/day24/part1.lua
+++ b/day24/part1.lua
@@ -1,120 +1,50 @@
 #!/usr/bin/env luajit
 require("utils")
 
-local function trunc(a)
-	if a < 0 then
-		return math.ceil(a)
-	else
-		return math.floor(a)
-	end
-end
-
-local map = { w=1, x=2, y=3, z=4 }
-local instructions = {}
-for line in io.lines(arg[3]) do
+local blocks = {}
+local current = nil
+local f = io.open(arg[3])
+local line = f:read("*l")
+while line do
 	local inst, a1, a2 = unpack(split(line, " "))
 	if inst == "inp" then
-		table.insert(instructions, function(memory, input)
-			local i, o = 9, memory[a1]
-			return function()
-				if i > 1 then
-					i = i - 1
-					memory[a1] = i
-					return input * 10 + i
-				else
-					memory[a1] = o
-				end
-			end
-		end)
+		if current ~= nil then
+			current = string.format("return function(w, x, y, z, input)\n%s\nreturn w, x, y, z\nend", current)
+			table.insert(blocks, assert(loadstring(current))())
+		end
+		current = a1.." = input"
 	elseif inst == "add" then
-		table.insert(instructions, function(memory, input)
-			local done, o = false, memory[a1]
-			return function()
-				if not done then
-					memory[a1] = memory[a1] + (memory[a2] or tonumber(a2))
-					done = true
-					return input
-				else
-					memory[a1] = o
-				end
-			end
-		end)
+		current = string.format("%s\n%s = %s + %s", current, a1, a1, a2)
 	elseif inst == "mul" then
-		table.insert(instructions, function(memory, input)
-			local done, o = false, memory[a1]
-			return function()
-				if not done then
-					memory[a1] = memory[a1] * (memory[a2] or tonumber(a2))
-					done = true
-					return input
-				else
-					memory[a1] = o
-				end
-			end
-		end)
+		current = string.format("%s\n%s = %s * %s", current, a1, a1, a2)
 	elseif inst == "div" then
-		table.insert(instructions, function(memory, input)
-			local done, o = false, memory[a1]
-			return function()
-				if not done and (memory[a2] or tonumber(a2)) ~= 0 then
-					memory[a1] = trunc(memory[a1] / (memory[a2] or tonumber(a2)))
-					done = true
-					return input
-				else
-					memory[a1] = o
-				end
-			end
-		end)
+		current = string.format("%s\nif %s == 0 then return end\n%s = math.modf(%s / %s)", current, a2, a1, a1, a2)
 	elseif inst == "mod" then
-		table.insert(instructions, function(memory, input)
-			local done, o = false, memory[a1]
-			return function()
-				local v = memory[a2] or tonumber(a2)
-				if not done and memory[a1] >= 0 and v > 0 then
-					memory[a1] = memory[a1] % v
-					done = true
-					return input
-				else
-					memory[a1] = o
-				end
-			end
-		end)
+		current = string.format("%s\nif %s < 0 or %s <= 0 then return end\n%s = %s %% %s", current, a1, a2, a1, a1, a2)
 	elseif inst == "eql" then
-		table.insert(instructions, function(memory, input)
-			local done, o = false, memory[a1]
-			return function()
-				if not done then
-					if memory[a1] == (memory[a2] or tonumber(a2)) then
-						memory[a1] = 1
-					else
-						memory[a1] = 0
-					end
-					done = true
-					return input
-				else
-					memory[a1] = o
-				end
-			end
-		end)
+		current = string.format("%s\nif %s == %s then %s = 1 else %s = 0 end", current, a1, a2, a1, a1)
 	end
+	line = f:read("*l")
+end
+if current ~= nil then
+	current = string.format("return function(w, x, y, z, input)\n%s\nreturn w, x, y, z\nend", current)
+	table.insert(blocks, assert(loadstring(current))())
 end
 
-local maximum = 0
-local function backtrack(i, memory, input)
-	if i == #instructions then
-		if memory.z == 0 and input > maximum then
-			print(input)
-			print(os.date())
-			maximum = input
+local function backtrack(i, w, x, y, z, output)
+	if i > #blocks then
+		if z == 0 then
+			print(string.format("%d", output))
+			os.exit()
 		end
 	else
-		-- io.write("i "..tostring(i).." ")
-		-- printtable(memory)
-		for newinput in instructions[i](memory, input) do
-			backtrack(i + 1, memory, newinput)
+		if i < 7 then print(output) end
+		for n = 9, 1, -1 do
+			local w0, x0, y0, z0 = blocks[i](w, x, y, z, n)
+			if w0 then
+				backtrack(i + 1, w0, x0, y0, z0, output * 10 + n)
+			end
 		end
 	end
 end
-
-backtrack(1, { w=0, x=0, y=0, z=0 }, 0)
-print(maximum)
+backtrack(1, 0, 0, 0, 0, 0)
diff --git a/day24/part2.lua b/day24/part2.lua
new file mode 100755
index 0000000..3514fb4
--- /dev/null
+++ b/day24/part2.lua
@@ -0,0 +1,50 @@
+#!/usr/bin/env luajit
+require("utils")
+
+local blocks = {}
+local current = nil
+local f = io.open(arg[3])
+local line = f:read("*l")
+while line do
+	local inst, a1, a2 = unpack(split(line, " "))
+	if inst == "inp" then
+		if current ~= nil then
+			current = string.format("return function(w, x, y, z, input)\n%s\nreturn w, x, y, z\nend", current)
+			table.insert(blocks, assert(loadstring(current))())
+		end
+		current = a1.." = input"
+	elseif inst == "add" then
+		current = string.format("%s\n%s = %s + %s", current, a1, a1, a2)
+	elseif inst == "mul" then
+		current = string.format("%s\n%s = %s * %s", current, a1, a1, a2)
+	elseif inst == "div" then
+		current = string.format("%s\nif %s == 0 then return end\n%s = math.modf(%s / %s)", current, a2, a1, a1, a2)
+	elseif inst == "mod" then
+		current = string.format("%s\nif %s < 0 or %s <= 0 then return end\n%s = %s %% %s", current, a1, a2, a1, a1, a2)
+	elseif inst == "eql" then
+		current = string.format("%s\nif %s == %s then %s = 1 else %s = 0 end", current, a1, a2, a1, a1)
+	end
+	line = f:read("*l")
+end
+if current ~= nil then
+	current = string.format("return function(w, x, y, z, input)\n%s\nreturn w, x, y, z\nend", current)
+	table.insert(blocks, assert(loadstring(current))())
+end
+
+local function backtrack(i, w, x, y, z, output)
+	if i > #blocks then
+		if z == 0 then
+			print(string.format("%d", output))
+			os.exit()
+		end
+	else
+		if i < 7 then print(output) end
+		for n = 1, 9 do
+			local w0, x0, y0, z0 = blocks[i](w, x, y, z, n)
+			if w0 then
+				backtrack(i + 1, w0, x0, y0, z0, output * 10 + n)
+			end
+		end
+	end
+end
+backtrack(1, 0, 0, 0, 0, 0)