Will wrap up christmas day tomorrow

2021/nim/day25.nim

@@ -0,0 +1,33 @@
+import ./common, std/[strutils, sequtils, tables, strformat, algorithm]
+
+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 process(input: Lines): Table[int, (int, int)] =
+  let instructionArgs = input.map(parseInstructionArg)
+  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]
+      if diff < 0:
+        result[previousI] = (9, -diff + 1)
+        result[i] = (9 + diff, 1)
+      else:
+        result[previousI] = (9 - diff, 1)
+        result[i] = (9, 1 + diff)
+    else: cantComputeYet.add (i, instructionArgs[o+15])
+
+proc p1(input: Lines): uint64 =
+  let processed = input.process
+  processed.keys.toSeq.sorted.mapIt($processed[it][0]).join().parseBiggestUInt()
+
+proc p2(input: Lines): uint64 =
+  let processed = input.process
+  processed.keys.toSeq.sorted.mapIt($processed[it][1]).join().parseBiggestUInt()
+
+time(&"Day 24 Part 1"): echo 24.loadInput.p1
+time(&"Day 24 Part 2"): echo 24.loadInput.p2