inital commitHEADmaster

1 files changed, 54 insertions, 0 deletions

diff --git a/11/2.lua b/11/2.lua
new file mode 100644
index 0000000..e26ddd2
--- /dev/null
+++ b/11/2.lua
@@ -0,0 +1,54 @@
+local monkeys = {}
+
+for line in io.lines() do
+	if line:match("^Monkey") then
+		local id = line:match("Monkey (%d+)")
+		table.insert(monkeys,{items={},inspected= 0, id=id})
+	elseif line:match("Starting items:") then
+		for item in line:gmatch("(%d+)") do
+			table.insert(monkeys[#monkeys].items,tonumber(item))
+		end
+	elseif line:match("Operation:") then
+		op, val = line:match("new = old (.) (%S+)")
+		monkeys[#monkeys].op = op
+		monkeys[#monkeys].val = val
+	elseif line:match("Test:") then
+		monkeys[#monkeys].test = tonumber(line:match("Test: divisible by (%d+)"))
+	elseif line:match("If true:") then
+		monkeys[#monkeys].t = tonumber(line:match("throw to monkey (%d+)")) + 1
+	elseif line:match("If false:") then
+		monkeys[#monkeys].f = tonumber(line:match("throw to monkey (%d+)")) + 1
+	end
+end
+local divisor = 1
+for _, monkey in pairs(monkeys) do
+	divisor = divisor * monkey.test
+end
+
+
+for round = 1,10000 do
+	for turn, monkey in ipairs(monkeys) do
+		monkey.inspected = monkey.inspected + #monkey.items
+		for _,item in ipairs(monkey.items) do
+			local worry = item
+			if monkey.op == "+" and monkey.val == "old" then
+				worry = worry * 2
+			elseif monkey.op == "*" and monkey.val == "old" then
+				worry = worry * worry
+			elseif monkey.op == "+" and tonumber(monkey.val) then
+				worry = worry + tonumber(monkey.val)
+			elseif monkey.op == "*" and tonumber(monkey.val) then
+				worry = worry * tonumber(monkey.val)
+			end
+			local newworry = worry % divisor
+			if newworry % monkey.test == 0 then
+				table.insert(monkeys[monkey.t].items,newworry)
+			else
+				table.insert(monkeys[monkey.f].items,newworry)
+			end
+		end
+		monkey.items = {}
+	end
+end
+table.sort(monkeys, function(a,b) return a.inspected > b.inspected end)
+print(monkeys[1].inspected * monkeys[2].inspected)