Day 2

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)
+}