AOC2022 Day 1

solution.jq

#!/usr/bin/env jq

# Run with:
# -R (read raw strings, not JSON texts)
# -s (slurp all inputs into an array)
# i.e. jq -f solution.jq -R -s input.dat

# When initially read in, the input will look like this:
# "1000\n2000\n3000\n\n4000\n\n5000\n6000\n\n7000\n8000\n9000\n\n10000\n"

# Marshall the input into an array of arrays of numbers
# - chop of last newline (so the split won't end up with a last empty value)
# - split on blank lines
# - split on newlines and convert values to numbers
def getinput:
  sub("\n$";"")
  | split("\n\n")
  | map(split("\n")|map(tonumber))
  ;

def part1:
  map(add) | max;

def part2:
  map(add) | sort[-3:] | add;

getinput as $input
| [
    ($input | part1),
    ($input | part2)
  ]