N, M = map(int, input().split())
C = list(map(int, input().split()))

l = len(C)

while(M != 0):
    M -= 1
    min_c = 100000
    min_c_loc = 10
    for i in range(l):
        if (C[i] < min_c and C[i] != 0):
            min_c = C[i]
            min_c_loc = i

    C[min_c_loc] -= 1

empty_box = 0

for c in C:
    if (c == 0):
        empty_box += 1
    
print(empty_box)