utils

function sum(array)
	local total = 0
	for i = 1, #array, 1 do
		total = total + array[i]
	end
	return total
end

function equal(a, b)
	if #a ~= #b then
		return false
	end
	for i = 1, #a, 1 do
		if a[i] ~= b[i] then
			return false
		end
	end
	return true
end