feat: solve day 6 puzzle 1

src/day06/puzzle1.lua

@@ -0,0 +1,39 @@
+local strings = require "cc.strings"
+local puzzle1 = {}
+
+function puzzle1.solve(input)
+    local lines = strings.split(input, "\n")
+    local problems = {}
+    local n = #lines
+
+    local ops = strings.split(lines[n], "%s+")
+
+    for i, line in ipairs(lines) do
+        local j = 1
+        for num in line:gmatch("(%d+)") do
+            local op = ops[j]
+            if i == 1 then
+                if op == "+" then
+                    table.insert(problems, 0)
+                else
+                    table.insert(problems, 1)
+                end
+            end
+            local val = tonumber(num)
+            if op == "+" then
+                problems[j] = problems[j] + val
+            else
+                problems[j] = problems[j] * val
+            end
+            j = j + 1
+        end
+    end
+
+    local total = 0
+    for _, val in ipairs(problems) do
+        total = total + val
+    end
+    return total
+end
+
+return puzzle1

src/day06/puzzle2.lua

@@ -0,0 +1,7 @@
+local puzzle2 = {}
+
+function puzzle2.solve(input)
+    return 0
+end
+
+return puzzle2