Nim

Reading this day's quest I was at first a bit confused what it asks me to calculate. Took me about a minute to realize that most of descriptions are not important and actual calculations for each part are very simple:

part 1 wants sum of each unique crate size
part 2 is same but only 20 smallest
part 3 is max count, because you can always put most crates in one large set and you only need 1 extra set per duplicate crate

proc solve_part1*(input: string): Solution =
  var seen: set[int16]
  for num in input.split(','):
    let num = parseInt(num).int16
    if num in seen: continue
    else:
      seen.incl num
      result.intVal += num

proc solve_part2*(input: string): Solution =
  var set = input.split(',').mapIt(parseInt(it).uint16)
  set.sort()
  result := set.deduplicate(isSorted=true)[0..<20].sum()

proc solve_part3*(input: string): Solution =
  var cnt = input.split(',').toCountTable()
  result := cnt.largest.val

Full solution at Codeberg: solution.nim