inital commitHEADmaster

1 files changed, 41 insertions, 0 deletions

diff --git a/10/1.lua b/10/1.lua
new file mode 100644
index 0000000..b20d193
--- /dev/null
+++ b/10/1.lua
@@ -0,0 +1,41 @@
+require "ext"
+
+local cpu = {
+	r = {x = 1},
+	isa = {
+		addx = {
+			nargs = 1,
+			cycles = 2,
+			f = function(self,v)
+				self.r.x = self.r.x + tonumber(v)
+			end
+		},
+		noop = {
+			nargs = 0,
+			cycles = 1,
+			f = function(self) end
+		}
+	}
+}
+
+local strength_sum = 0
+local cycle = 1
+for line in io.lines() do
+	local parts = {}
+	for part in line:gmatch("(%S+)") do
+		table.insert(parts,part)
+	end
+	local insn = table.remove(parts,1)
+	local ins = cpu.isa[insn]
+	assertf(ins, "No instruction %s in %s",insn,line)
+	for i = cycle,cycle + ins.cycles - 1 do
+		if (i - 20) % 40  == 0 then
+			local strength = i * cpu.r.x
+			strength_sum = strength_sum + strength
+			break
+		end
+	end
+	cycle = cycle + ins.cycles
+	ins.f(cpu,table.unpack(parts))
+end
+print(strength_sum)