5820f6f459
Write a random number generator for [0,7) using only a random number generator for [0,5). Ensure the results are uniformly distributed.
22 lines
445 B
Python
22 lines
445 B
Python
# Define a function, rand7, that generates a random number [0,7), using only
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# rand5, which generates a random number [0,5).
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import random
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from collections import Counter
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# Returns [0,4]
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def rand5():
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return random.randint(0,4)
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def rand4():
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x = rand7()
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if x >= 4:
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return rand4()
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return x
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# Return [0,6]
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def rand7():
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return sum(rand5() for _ in range(7)) % 7
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c = Counter([rand4() for _ in range(100000)])
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print(c)
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