import time
a, b, t, p = 1, 1/2**0.5, 1/4, 1
for i in range(5):
a, b, t, p = (a+b)/2, (a*b)**0.5, t-p*((b-a)/2)**2, p*2
start = time.time()
print((a + b)**2 / (4 * t))
end = time.time()
print (end - start)
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