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www.mikescher.com/www/statics/aoc/2022/10_solution-2.nim

64 lines
1.4 KiB
Nim

import std/strutils
import std/sequtils
type Command = object
cmd: string
param: int
proc run10_2(): string =
const input = staticRead"../input/day10.txt"
let lines = splitLines(input).filter(proc(p: string): bool = p != "")
var prog: seq[Command] = @[]
for line in lines:
let cmd = line.split(" ")[0]
if cmd == "addx":
prog.add(Command(cmd: "noop", param: 0))
prog.add(Command(cmd: "addx", param: parseInt(line.split(" ")[1])))
elif cmd == "noop":
prog.add(Command(cmd: "noop", param: 0))
else:
quit "UNKNOWN OP"
#for p in prog: echo p
var output = ""
var regX = 1
for i in 0 ..< len(prog):
let before = regX
let hpos = i mod 40
let spos = regX
let lit = abs(spos - hpos) <= 1
if prog[i].cmd == "noop":
discard
elif prog[i].cmd == "addx":
regX += prog[i].param
else:
quit "UNKNOWN OP"
if lit:
output &= "#"
else:
output &= " "
#echo "[", (i+1), "]: ", before, " -> ", regX, " (", prog[i].cmd, " ", prog[i].param, ")"
return (0 ..< 6).mapIt(output.substr(it * 40, it*40 + 39)).join("\n")
when not defined(js):
echo run10_2()
else:
proc js_run10_2(): cstring {.exportc.} =
return cstring(run10_2())