Day 4 done

2025/Day3/Day3_second.lua

@@ -0,0 +1,81 @@
+#!/usr/bin/lua
+-- See https://adventofcode.com/2025/day/3
+
+local DEBUG = false
+
+function debug(msg)
+	if DEBUG then
+		print(msg)
+	end
+end
+
+function MaxJolt(Battery, Size)
+	-- TODO - This going to be a rework, I need to loop 12 times
+	local BatteryDigits = {}
+	for I = 1, tonumber(Size) do
+		BatteryDigits[I] = 0
+	end
+
+	-- lastdigit = tonumber(string.sub(Battery, -1))
+	-- debug("lastdigit " .. lastdigit)
+	--
+	-- BatteryNoLast = string.sub(Battery, 0, -2)
+	-- BatteryNoLast:gsub(".", function(c)
+	-- 	table.insert(b, c)
+	-- 	return c
+	-- end)
+	--
+	-- for key, value in pairs(b) do
+	-- 	checkdigit = tonumber(value)
+	-- 	if firstdigit < checkdigit then
+	-- 		firstdigit = checkdigit
+	-- 	end
+	-- end
+	--
+	-- local passedfirst = false
+	-- for key, value in pairs(b) do
+	-- 	checkdigit = tonumber(value)
+	-- 	if passedfirst and seconddigit < checkdigit then
+	-- 		seconddigit = checkdigit
+	-- 	end
+	-- 	if checkdigit == firstdigit then
+	-- 		passedfirst = true
+	-- 	end
+	-- end
+	--
+	-- if seconddigit < lastdigit then
+	-- 	seconddigit = lastdigit
+	-- end
+	--
+	-- debug("First " .. firstdigit)
+	-- debug("Second " .. seconddigit)
+	-- return tostring(firstdigit) .. tostring(seconddigit)
+	local BatteryString = ""
+	for I = 1, tonumber(Size) do
+		BatteryString = BatteryString .. tostring(BatteryDigits[I])
+	end
+	return BatteryString
+end
+
+function TestMaxJolt(Battery, Test, Size)
+	local MJ = MaxJolt(Battery, Size)
+	if MJ == Test then
+		print("WIN  - " .. Battery .. " " .. MJ .. " == " .. Test)
+	else
+		print("FAIL - " .. Battery .. " " .. MJ .. " != " .. Test)
+	end
+end
+
+print("# Self Test")
+TestMaxJolt("987654321111111", "987654321111", 12)
+TestMaxJolt("811111111111119", "811111111119", 12)
+TestMaxJolt("234234234234278", "434234234278", 12)
+TestMaxJolt("818181911112111", "888911112111", 12)
+
+print("# Calculate MaxJolt")
+local TotalJolt = 0
+
+for battery_line in io.lines("full_input") do
+	TotalJolt = TotalJolt + MaxJolt(battery_line)
+end
+print("Total " .. TotalJolt)