n,m = map(int,input().split())
c = list(map(int,input().split()))
for i in range(m):
	tmp = 10**9
	ind = 0
	for j in range(n):
		if 0 < c[j] < tmp:
			tmp = c[j]
			ind = j
	c[ind] -= 1

ans = 0
for i in range(n):
	if 0 == c[i]: ans += 1
print(ans)