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2025/Day12/Day12.lua

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+-- Advent of Code 2025 - Day 12 - Bas Grolleman
+require("functions")
+print("Day 12")
+local filename = "Day12/test"
+local input = file_lines_to_table(filename)
+
+function parseInput(lines)
+	local packages = {}
+	local locations = {}
+
+	-- Parse first dataset (patterns 0-5)
+	local pattern = {}
+	local patternNum = -1
+
+	for i, line in ipairs(lines) do
+		if line:match("^%d:$") then
+			-- New pattern number
+			patternNum = tonumber(line:sub(1, 1))
+			pattern = {}
+		elseif line:match("^[%.#]+$") and #line == 3 and patternNum ~= -1 then
+			-- Pattern row
+			table.insert(pattern, line)
+			if #pattern == 3 then
+				packages[patternNum] = pattern
+			end
+		end
+	end
+
+	-- Parse second dataset (dimension and coordinate data)
+	for i, line in ipairs(lines) do
+		local x, y, coords = line:match("^(%d+)x(%d+):%s+(.+)$")
+		if x and y then
+			local data = { x = tonumber(x), y = tonumber(y), coords = {} }
+			for num in coords:gmatch("%d+") do
+				table.insert(data.coords, tonumber(num))
+			end
+			table.insert(locations, data)
+		end
+	end
+
+	return packages, locations
+end
+
+local shapes, locations = parseInput(input)
+
+print_table(shapes)
+print_table(locations)