#!/usr/bin/env julia

infile = size(ARGS, 1) > 0 ? ARGS[1] : "day2input.txt"
println("infile = ", infile)

a_move_value = Dict("A"=>1, "B"=>2, "C"=>3)
x_move_value = Dict("X"=>1, "Y"=>2, "Z"=>3)
function score(opponent, self)
  global a_move_value, x_move_value
  oval = a_move_value[opponent]
  sval = x_move_value[self]

  diff = sval - oval

  if diff == 0
    # tie
    return 3 + sval
  elseif (diff == 1 || diff == -2)
    # win
    return 6 + sval
  else
    # loss
    return sval
  end
end

io = open(infile, "r")
total = 0
for line in eachline(io)
  global total
  o, s = split(line)
  total += score(o, s)
end

println(total)