import ./common, std/[strutils, sugar, sequtils, options, tables, sets, strformat, algorithm, pegs] proc parseInstructionArg(s: string): int = let ss = s.split(' ') if ss.len > 2 and not (ss[2][0] in 'w'..'z'): ss[2].parseInt else: 0 proc p1(input: Lines): uint64 = let instructionArgs = input.map(parseInstructionArg) var reversedDigits = initTable[int, int]() var cantComputeYet: seq[(int, int)] = @[] for i in 0..13: let o = i * 18 if instructionArgs[o+4] == 26: let (previousI, previousAddend) = cantComputeYet.pop let diff = previousAddend + instructionArgs[o+5] echo diff echo previousI if diff < 0: reversedDigits[previousI] = 9 reversedDigits[i] = 9 + diff else: reversedDigits[previousI] = 9 - diff reversedDigits[i] = 9 else: cantComputeYet.add (i, instructionArgs[o+15]) reversedDigits.keys.toSeq.sorted.mapIt($reversedDigits[it]).join().parseBiggestUInt() time(&"Day 24 Part 1"): echo 24.loadInput.p1