feat: solve day 1 puzzle 1

src/day01/puzzle1.lua

@@ -0,0 +1,25 @@
+local utils = require "utils"
+local puzzle1 = {}
+
+function puzzle1.solve(input)
+    local password = 0
+    local cursor = 50
+    
+    local lines = utils.splitLines(input)
+    for _, line in ipairs(lines) do
+        local dir = line:sub(1, 1)
+        local dist = tonumber(line:sub(2))
+        if dir == "R" then
+            cursor = cursor + dist
+        else
+            cursor = cursor - dist
+        end
+        cursor = cursor % 100
+        if cursor == 0 then
+            password = password + 1
+        end
+    end
+    return password
+end
+
+return puzzle1