day_01.lua

local calories = 0
local elf_calories = {}

for line in io.lines("./input1.txt") do
  if line == nil then
    table.insert(elf_calories, calories)
    break
  elseif line == "" then
    table.insert(elf_calories, calories)
    calories = 0
  else
    local number = tonumber(line)
    calories = calories + number
  end
end

table.sort(elf_calories, function(a, b)
  return a > b
end)

print("Part 1: " .. elf_calories[1])
print("Part 2: " .. elf_calories[1] + elf_calories[2] + elf_calories[3])