40 lines
2.3 KiB
Plaintext
40 lines
2.3 KiB
Plaintext
const pat1 = (" ## #", " ## #", " # ##", " #### #", " # ##",
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" ## #", " # ####", " ### ##", " ## ###", " # ##")
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const pat2 = [replace(x, r"[# ]" => (x) -> x == " " ? "#" : " ") for x in pat1]
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const ptod1 = Dict((b => a - 1) for (a, b) in enumerate(pat1))
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const ptod2 = Dict((b => a - 1) for (a, b) in enumerate(pat2))
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const reg = Regex("^\\s*# #\\s*((?:" * join(pat1, "|") *
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"){6})\\s*# #\\s*((?:" * join(pat2, "|") * "){6})\\s*# #\\s*")
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const lines = [
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" # # # ## # ## # ## ### ## ### ## #### # # # ## ## # # ## ## ### # ## ## ### # # # ",
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" # # # ## ## # #### # # ## # ## # ## # # # ### # ### ## ## ### # # ### ### # # # ",
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" # # # # # ### # # # # # # # # # # ## # ## # ## # ## # # #### ### ## # # ",
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" # # ## ## ## ## # # # # ### # ## ## # # # ## ## # ### ## ## # # #### ## # # # ",
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" # # ### ## # ## ## ### ## # ## # # ## # # ### # ## ## # # ### # ## ## # # # ",
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" # # # # ## ## # # # # ## ## # # # # # #### # ## # #### #### # # ## # #### # # ",
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" # # # ## ## # # ## ## # ### ## ## # # # # # # # # ### # # ### # # # # # ",
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" # # # # ## ## # # ## ## ### # # # # # ### ## ## ### ## ### ### ## # ## ### ## # # ",
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" # # ### ## ## # # #### # ## # #### # #### # # # # # ### # # ### # # # ### # # # ",
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" # # # #### ## # #### # # ## ## ### #### # # # # ### # ### ### # # ### # # # ### # # ",
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]
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function decodeUPC(line)
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if (m = match(reg, line)) != nothing
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mats, dig = filter(!isempty, m.captures), Int[]
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for mat in mats
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append!(dig, [ptod1[x.match] for x in eachmatch(r"(.......)", mat)
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if haskey(ptod1, x.match)])
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append!(dig, [ptod2[x.match] for x in eachmatch(r"(.......)", mat)
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if haskey(ptod2, x.match)])
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end
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dsum = sum([(isodd(i) ? 3 : 1) * n for (i, n) in enumerate(dig)])
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(dsum % 10 == 0) && return prod(string.(dig))
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end
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return ""
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end
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for line in lines
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println((s = decodeUPC(line)) != "" ? s :
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(s = decodeUPC(reverse(line))) != "" ? s : "Invalid")
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end
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