n, m = gets.chomp.split(" ").map(&:to_i)
lists = gets.chomp.split(" ").map(&:to_i)
i = -1

while m > -1 do
	lists[i] -= 1
	if lists[i] == 0
		i += 1
	end
	m -= 1;
end

count = 0
lists.each{|list| count += 1 if list == 0}
puts count