commit 406d4f06eb1bfef01fd48d180eb79890384ae00d
Author: Hugo Mårdbrink <hugo@mardbrink.se>
Date:   Wed Oct 1 11:40:08 2025 +0200

    Day 1

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bd12779
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.bin
+*.txt
diff --git a/d01/main.odin b/d01/main.odin
new file mode 100644
index 0000000..350d2de
--- /dev/null
+++ b/d01/main.odin
@@ -0,0 +1,64 @@
+package main
+
+import "core:slice"
+import "core:strconv"
+import "core:strings"
+import "core:bytes"
+import "core:fmt"
+import "core:os"
+
+import "../util"
+
+part_1 :: proc(lines: []string) {
+    nums := slice.mapper(lines[:], proc(line: string) -> i64 {
+        num, ok := strconv.parse_int(line); assert(ok)
+        return i64(num)
+    })
+
+    maybe_result: Maybe(i64) = nil
+    for num1, idx1 in nums {
+        for num2 in nums[idx1:] {
+            sum := num1 + num2
+            if sum == 2020 {
+                maybe_result = num1 * num2
+                break
+            }
+        }
+    }
+
+    result, ok := maybe_result.?; assert(ok)
+    fmt.printfln("Part 1: %d", result)
+}
+
+part_2 :: proc(lines: []string) {
+    nums := slice.mapper(lines[:], proc(line: string) -> i64 {
+        num, ok := strconv.parse_i64(line); assert(ok)
+        return num
+    })
+    
+    maybe_result: Maybe(i64) = nil
+    for num1, idx1 in nums {
+        for num2, idx2 in nums[idx1:] {
+            for num3 in nums[idx2:] {
+                sum := num1 + num2 + num3
+                if sum == 2020 {
+                    maybe_result = num1 * num2 * num3
+                    break
+                }
+            }
+        }
+    }
+
+    result, ok := maybe_result.?; assert(ok)
+    fmt.printfln("Part 2: %d", result)
+}
+
+main :: proc() {
+    INPUT :: #load("input.txt", string)
+    lines := strings.split(INPUT, "\n")
+    defer delete(lines)
+    lines = lines[:len(lines)-1]
+
+    part_1(lines)
+    part_2(lines)
+}
diff --git a/util/util.odin b/util/util.odin
new file mode 100644
index 0000000..a5e4c54
--- /dev/null
+++ b/util/util.odin
@@ -0,0 +1,2 @@
+package util
+