019f8fd211
git-subtree-dir: users/wpcarro git-subtree-mainline:464bbcb15cgit-subtree-split:24f5a642afChange-Id: I6105b3762b79126b3488359c95978cadb3efa789
25 lines
543 B
Python
25 lines
543 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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# Return [0,6]
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def rand7_a():
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return sum(rand5() for _ in range(7)) % 7
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# Return [0,6]
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def rand7_b():
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x = 5 * rand5() + rand5()
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if x < 21:
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return x % 7
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return rand7_b()
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c = Counter([rand7_a() for _ in range(100000)])
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print(c)
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c = Counter([rand7_b() for _ in range(100000)])
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print(c)
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