Day 5

d05/main.odin

@@ -0,0 +1,104 @@
+package main
+
+import "core:math/linalg"
+import "core:container/queue"
+import "core:fmt"
+import "core:math"
+import "core:os"
+import "core:slice"
+import "core:strconv"
+import "core:strings"
+import "core:time"
+import "core:unicode/utf8"
+
+import util "../util"
+
+Range :: struct {
+	low:  int,
+	high: int,
+}
+
+in_range_inclusive :: proc(a, l, h: $T) -> bool {
+	return a >= l && a <= h
+}
+
+part_1 :: proc(lines: []string) {
+	result := 0
+	split_idx, _ := slice.linear_search(lines, "")
+	ranges, ids := slice.split_at(lines, split_idx)
+
+	fresh_ranges, _ := slice.mapper(ranges, proc(range: string) -> Range {
+		parts := strings.split(range, "-")
+		low, _ := strconv.parse_int(parts[0])
+		high, _ := strconv.parse_int(parts[1])
+
+		return Range{low = low, high = high}
+	})
+	ing_ids, _ := slice.mapper(ids, proc(id: string) -> int {
+		ing_id, _ := strconv.parse_int(id)
+		return ing_id
+	})
+
+	for id in ing_ids {
+		for r in fresh_ranges {
+			if in_range_inclusive(id, r.low, r.high) {
+				result += 1
+				break
+			}
+		}
+	}
+
+	fmt.printfln("  [Result] %v", result)
+}
+
+part_2 :: proc(lines: []string) {
+	result := 0
+	split_idx, _ := slice.linear_search(lines, "")
+	ranges, _ := slice.split_at(lines, split_idx)
+
+	fresh_ranges, _ := slice.mapper(ranges, proc(range: string) -> Range {
+		parts := strings.split(range, "-")
+		low, _ := strconv.parse_int(parts[0])
+		high, _ := strconv.parse_int(parts[1])
+		return Range{low = low, high = high}
+	})
+
+	slice.sort_by(fresh_ranges, proc(a, b: Range) -> bool {
+		return a.low < b.low
+	})
+
+	current := fresh_ranges[0]
+	for i in 1..<len(fresh_ranges) {
+		r := fresh_ranges[i]
+		if r.low <= current.high + 1 {
+			current.high = max(current.high, r.high)
+		} else {
+			result += current.high - current.low + 1
+			current = r
+		}
+	}
+	result += current.high - current.low + 1
+
+	fmt.printfln("  [Result] %v", result)
+}
+
+main :: proc() {
+	context.allocator = context.temp_allocator
+	defer free_all(context.temp_allocator)
+
+	INPUT :: #load("input.txt", string)
+	lines := strings.split(INPUT, "\n")
+	lines = lines[:len(lines) - 1]
+
+	fmt.println("[Part 1]")
+	start := time.tick_now()
+	part_1(lines)
+	duration := time.tick_diff(start, time.tick_now())
+	fmt.printfln("  [Time]   %vms\n", time.duration_milliseconds(duration))
+
+	fmt.printfln("[Part 2]")
+	start = time.tick_now()
+	part_2(lines)
+	duration = time.tick_diff(start, time.tick_now())
+	fmt.printfln("  [Time]   %vms", time.duration_milliseconds(duration))
+}