local calc = (function ()
	local t = {}
	return function (n)
		if t[n] ~= nil then
			return t[n]
		else
			local s = tostring(n)
			local r = tonumber(s:sub(1,1))
			if s:sub(2,2) ~= "" then
				r = r + tonumber(s:sub(2,2))
			end
			t[n] = r
			return r
		end
	end
end)()

function count(m, d, r)
	if d > 0 then
		return count(m, d-1, m == calc(d) and r+1 or r)
	end
	return r
end

local t = {31; 28; 31; 30; 31; 30; 31; 31; 30; 31; 30; 31}
local r = 0
for i,v in ipairs(t) do
	r = r + count(i, v, 0)
end
print(r)