First star done

2025/Day3/Day3_first.lua

@@ -1,7 +1,7 @@
 #!/usr/bin/lua
 -- See https://adventofcode.com/2025/day/3
 
-local DEBUG = true
+local DEBUG = false
 
 function debug(msg)
 	if DEBUG then
@@ -28,13 +28,24 @@ function MaxJolt(Battery)
 		checkdigit = tonumber(value)
 		if firstdigit < checkdigit then
 			firstdigit = checkdigit
-		elseif seconddigit < checkdigit then
+		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)
@@ -53,4 +64,12 @@ print("# Self Test")
 TestMaxJolt("987654321111111", "98")
 TestMaxJolt("811111111111119", "89")
 TestMaxJolt("234234234234278", "78")
-TestMaxJolt("818181911112111", "89")
+TestMaxJolt("818181911112111", "92")
+
+print("# Calculate MaxJolt")
+local TotalJolt = 0
+
+for battery_line in io.lines("full_input") do
+	TotalJolt = TotalJolt + MaxJolt(battery_line)
+end
+print("Total " .. TotalJolt)