79 lines
1.6 KiB
Odin
79 lines
1.6 KiB
Odin
package main
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import "core:fmt"
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import "core:math"
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import "core:os"
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import "core:strconv"
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import "core:strings"
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import "core:time"
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import util "../util"
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DIAL_START :: 50
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DIAL_MAX :: 100
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part_1 :: proc(lines: ^[]string) {
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result := 0
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dial := DIAL_START
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for line in lines {
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amount, ok := strconv.parse_int(line[1:]); assert(ok)
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dir := line[0]
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if dir == 'L' do amount = -amount
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dial += amount
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dial %%= DIAL_MAX
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if dial == 0 do result += 1
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}
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fmt.printfln(" [Result] %v", result)
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}
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part_2 :: proc(lines: ^[]string) {
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result := 0
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dial := DIAL_START
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for line in lines {
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amount, ok := strconv.parse_int(line[1:]); assert(ok)
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result += amount / DIAL_MAX
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dir := line[0]
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if dir == 'L' do amount = -amount
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old_dial := dial
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dial += amount
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dial %%= DIAL_MAX
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switch {
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case dial == 0:
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result += 1
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case old_dial != 0:
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wrapped := (dir == 'L' && old_dial < dial) || (dir == 'R' && old_dial > dial)
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if wrapped do result += 1
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}
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}
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fmt.printfln(" [Result] %v", result)
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}
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main :: proc() {
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context.allocator = context.temp_allocator
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defer free_all(context.temp_allocator)
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INPUT :: #load("input.txt", string)
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lines := strings.split(INPUT, "\n")
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lines = lines[:len(lines) - 1]
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fmt.println("[Part 1]")
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start := time.tick_now()
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part_1(&lines)
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duration := time.tick_diff(start, time.tick_now())
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fmt.printfln(" [Time] %vns\n", time.duration_nanoseconds(duration))
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fmt.printfln("[Part 2]")
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start = time.tick_now()
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part_2(&lines)
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duration = time.tick_diff(start, time.tick_now())
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fmt.printfln(" [Time] %vns", time.duration_nanoseconds(duration))
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}
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