n = gets.chomp.to_i
def fact(n, a = 1)
  return a if n == 0
  fact n - 1, a * n
end

s = fact(n).to_s

ans = []
s.to_s.split('').reverse.each_with_index do |i, j|
  break if j >= 12
  ans.unshift i
end

puts ans.join