From eaedf6b76bf7bc6bb564a3c2a650f1fe4a438281 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hugo=20M=C3=A5rdbrink?= <hugo@mardbrink.se>
Date: Wed, 1 Oct 2025 12:09:02 +0200
Subject: [PATCH] Day 2

---
 d02/main.odin | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 d02/main.odin

diff --git a/d02/main.odin b/d02/main.odin
new file mode 100644
index 0000000..2d25540
--- /dev/null
+++ b/d02/main.odin
@@ -0,0 +1,73 @@
+package main
+
+import "core:math"
+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) {
+    result := 0
+
+    for line in lines {
+        line_parts := strings.split(line, " ")
+
+        password := line_parts[2]
+        policy_letter := strings.trim_suffix(line_parts[1], ":")
+        
+        range_parts := strings.split(line_parts[0], "-")
+        policy_min, _ := strconv.parse_int(range_parts[0]); 
+        policy_max, _ := strconv.parse_int(range_parts[1]);
+       
+        password_policy_count := strings.count(password, policy_letter)
+
+        if password_policy_count <= policy_max && password_policy_count >= policy_min {
+            result += 1
+        }
+    }
+
+    fmt.printfln("Part 1: %d", result)
+}
+
+part_2 :: proc(lines: []string) {
+    result := 0
+
+    for line in lines {
+        line_parts := strings.split(line, " ")
+
+        password := line_parts[2]
+        policy_letter := strings.trim_suffix(line_parts[1], ":")
+        
+        range_parts := strings.split(line_parts[0], "-")
+        policy_min, _ := strconv.parse_int(range_parts[0]); 
+        policy_max, _ := strconv.parse_int(range_parts[1]);
+       
+        password_policy_count := strings.count(password, policy_letter)
+        
+        fst_hit := password[policy_min-1] == policy_letter[0]
+        snd_hit := password[policy_max-1] == policy_letter[0]
+        
+        if fst_hit ~ snd_hit {
+            result += 1
+        }
+    }
+
+    fmt.printfln("Part 2: %d", result)
+}
+
+main :: proc() {
+    context.allocator = context.temp_allocator
+
+    INPUT :: #load("input.txt", string)
+    lines := strings.split(INPUT, "\n")
+    lines = lines[:len(lines)-1]
+
+    part_1(lines)
+    part_2(lines)
+
+    free_all(context.temp_allocator)
+}