n=gets.to_i

# f[49]=000_000_000_0
# f[50]=000_000_000_000

if n>49
  puts '000000000000'
  exit(0)
end

fact=(1..n).inject(1){|f, i| f*=i}

ans=[]
while ans.size<12 and fact.nonzero?
  ans<< fact%10
  fact/=10
end

puts ans.reverse.join("")