Day 3: Mull It Over
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4 points
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Uiua
Uses experimental feature of fold to track the running state of do/donât.
[edit] Slightly re-written to make it less painful :-) Try it online!
# Experimental!
DataPâ â $ xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))
DataPâ â $ xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))
GetMul â $ mul\((\d{1,3}),(\d{1,3})\)
GetMulDoDont â $ mul\(\d{1,3},\d{1,3}\)|do\(\)|don\'t\(\)
&p/+âĄ(/ĂâĄââ1)regexGetMul DataPâ # Part 1
# Build an accumulator to track running state of do/don't
Filter â â1â:â§(âŁ(0 °"don"|1 °"do("|.â)) :1âĄ(â3°âĄ)
âĄâą regex GetMulDoDont DataPâ
âœâžâĄâ(â"mul"â3)âœâžFilter # Apply Filter, remove the spare 'do's
&p/+âĄâ(/ĂâĄâââ1âąregexGetMul) # Get the digits and multiply, sum.
