26 lines
584 B
Nim
26 lines
584 B
Nim
import
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std/math,
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std/sequtils,
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std/strformat,
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std/strutils,
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std/tables
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import
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../../adventofcode
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let lines = adventofcode.getInput(2021, 8).splitLines()
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var decodedDigits = newTable[int, int]()
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for i in [2, 3, 4, 7]:
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decodedDigits[i] = 0
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for line in lines:
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let lineParts = line.split(" | ")
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# We only consider output digits for now
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let outputDigits = lineParts[1].split(" ")
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for outputDigit in outputDigits:
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if decodedDigits.hasKey outputDigit.len():
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decodedDigits[outputDigit.len()] += 1
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echo fmt"Answer: {math.sum toSeq decodedDigits.values()}" |