local mfl, mce = math.floor, math.ceil
local ffi = require("ffi")
local C = ffi.C
ffi.cdef[[
long long atoll(const char*);
]]

local function lltonumber(str)
  return C.atoll(str)
end
local n = io.read()
n = lltonumber(n)
local t = {}
while 0LL < n do
  local left, right = 1, 1000000007-6
  while 1 < right - left do
    local mid = mfl((left + right) / 2)
    local v = 1LL * mid * mid
    if v <= n then
      left = mid
    else
      right = mid
    end
  end
  local z = 1LL * left * left
  n = n - z
  z = tostring(z):gsub("LL", "")
  table.insert(t, z)
end
print(#t)
print(table.concat(t, " "))