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https://github.com/onyx-and-iris/grokking-algorithms.git
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44 lines
823 B
Python
44 lines
823 B
Python
import logging
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import random
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logging.basicConfig(level=logging.DEBUG)
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logger = logging.getLogger(__name__)
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def binary_search(arr, item):
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low = 0
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high = len(arr) - 1
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while low <= high:
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mid = (low + high) // 2
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guess = arr[mid]
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if guess == item:
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return mid
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elif guess > item:
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high = mid - 1
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else:
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low = mid + 1
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return None
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LOWER = 1000
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UPPER = 1000000
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SAMPLE_SIZE = 1000
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numbers = random.sample(range(LOWER, UPPER), SAMPLE_SIZE)
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numbers.sort()
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seen = set()
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count = 0
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result = None
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while not result:
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guess = random.randrange(LOWER, UPPER)
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if guess not in seen:
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count += 1
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seen.add(guess)
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result = binary_search(numbers, guess)
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print(f"Found {guess} at index {result} after {count} attempts")
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