Prepare for other years

2020/src/main/kotlin/Day01.kt

@@ -0,0 +1,32 @@
+package be.vandewalleh.aoc.days
+
+import be.vandewalleh.aoc.utils.input.Day
+import be.vandewalleh.aoc.utils.input.Input
+import be.vandewalleh.aoc.utils.input.Lines
+
+@Day(1)
+class Day01(@Lines input: Input<IntArray>) {
+    private val items = input.value
+
+    fun part1(): Int? {
+        items.forEach { a ->
+            items.forEach { b ->
+                if (a + b == 2020) return a * b
+            }
+        }
+        return null
+    }
+
+    fun part2(): Int? {
+        items.forEach { a ->
+            items.forEach { b ->
+                items.forEach { c ->
+                    if (a + b + c == 2020) return a * b * c
+                }
+            }
+        }
+        return null
+    }
+
+}
+