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def streaming_algorithm(A, epsilon, delta):
# Initialize parameters
p = 1
X = set()
thresh = math.ceil((12 / epsilon ** 2) * math.log(8 * len(A) / delta))
# Process the stream
for ai in A:
if ai in X:
X.remove(ai)
if random.random() < p:
X.add(ai)
if len(X) == thresh:
X = {x for x in X if random.random() >= 0.5}
p /= 2
if len(X) == thresh:
return '⊥'
return len(X) / p
# Example usage
A = [1, 2, 3, 1, 2, 3]
epsilon = 0.1
delta = 0.01
output = streaming_algorithm(A, epsilon, delta)
print(output)