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n, x = map(int, input().split()) p = list(map(int, input().split())) ans = sum([p.count(i) for i in range(10, 13)]) for i in range(9, 0, -1): cnt = p.count(i) for _ in range(cnt): if x >= 10 - i: x -= 10 - i ans += 1 print(ans)