63 lines
1.5 KiB
Nim
63 lines
1.5 KiB
Nim
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import std/strutils
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import std/sequtils
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import std/algorithm
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proc run05_1(): string =
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const input = staticRead"../input/day05.txt"
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let lines = splitLines(input).filter(proc(p: string): bool = p != "")
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let stackcount = lines.filter(proc(p:string): bool = p.startsWith(" 1 "))[0].toSeq().filter(proc(p: char): bool = p != ' ').len()
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#echo stackcount
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var stacks = newSeq[seq[char]](0)
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for sidx in 0..(stackcount-1):
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stacks.add(newSeq[char](0))
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var headerLen = 0
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for line in lines:
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if line.startsWith(" 1 "):
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break
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headerLen += 1
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for sidx in 0..(len(stacks)-1):
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let chr = line[1 + 4 * sidx]
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if chr != ' ':
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stacks[sidx].add(chr)
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for i in 0..(stackcount-1):
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stacks[i].reverse()
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#echo stacks
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for line in lines[headerLen+1..len(lines)-1]:
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let split = line.split(" ")
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let cnt = parseInt(split[1])
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let src = parseInt(split[3])-1
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let dst = parseInt(split[5])-1
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#echo "move", cnt, " : ", src, " -> ", dst
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for _ in 1..cnt:
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let chr = stacks[src][len(stacks[src]) - 1]
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stacks[src].delete(len(stacks[src]) - 1)
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stacks[dst].add(chr)
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#echo stacks
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let heads = stacks.map(proc(p:seq[char]): char = p[p.len()-1])
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#echo heads
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return cast[string](heads)
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when not defined(js):
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echo run05_1()
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else:
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proc js_run05_1(): cstring {.exportc.} =
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return cstring(run05_1())
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