local n = io.read("*n")
if(60 <= n) then print("000000000000")
else
  local m = 1
  for i = 2, n do m = (m * i) % 1000000000000 end
  if(15 <= n) then
    local dig = 0
    local tm = m
    while(0 < tm) do
      tm = math.floor(tm / 10)
      dig = dig + 1
    end
    if(m == 0) then dig = 1 end
    for i = dig + 1, 12 do
      io.write("0")
    end
    io.write(m .. "\n")
  else
    print(m)
  end
end