n = gets.to_i

if (n == 0) then
	p 101
end

a = gets.split.map(&:to_i)
sum_v = a.sum()
#p sum_v


cnt1 = 0
101.times do |ak|
	if ((ak + sum_v) % n == 0) then
		cnt1 += 1
	end
end
p cnt1