59 lines
1.2 KiB
Nim
59 lines
1.2 KiB
Nim
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import std/strutils
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import std/sequtils
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type Command = object
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cmd: string
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param: int
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proc run10_1(): string =
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const input = staticRead"../input/day10.txt"
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let lines = splitLines(input).filter(proc(p: string): bool = p != "")
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var prog: seq[Command] = @[]
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for line in lines:
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let cmd = line.split(" ")[0]
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if cmd == "addx":
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prog.add(Command(cmd: "noop", param: 0))
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prog.add(Command(cmd: "addx", param: parseInt(line.split(" ")[1])))
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elif cmd == "noop":
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prog.add(Command(cmd: "noop", param: 0))
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else:
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quit "UNKNOWN OP"
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#for p in prog: echo p
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var sigsum = 0
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var regX = 1
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for i in 0 ..< len(prog):
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let before = regX
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let cycle = i+1
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if (cycle+20) mod 40 == 0:
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sigsum += (i+1) * regX
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if prog[i].cmd == "noop":
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discard
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elif prog[i].cmd == "addx":
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regX += prog[i].param
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else:
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quit "UNKNOWN OP"
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#echo "[", (i+1), "]: ", before, " -> ", regX, " (", prog[i].cmd, " ", prog[i].param, ")"
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return intToStr(sigsum)
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when not defined(js):
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echo run10_1()
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else:
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proc js_run10_1(): cstring {.exportc.} =
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return cstring(run10_1())
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