#!/usr/bin/env lua

h = 0
v = 0

function down(val) v = v + val end
function up(val) v = v - val end
function forward(val) h = h + val end

for line in io.lines("input.txt") do
    cmd, val = line:gmatch("(%S+) (%S+)")()
    _G[cmd](val)
end

print(("Answer: %d"):format(h * v))