n = gets.to_i
if(n > 60)
  puts "000000000000"
else
  a = 1
  (1..n).each do |i|
    a = a * i % 1000000000000
  end
  if(n > 15)
    puts ("000000000000" + a.to_s)[-12..-1]
  else
    puts a
  end
end