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26 lines
581 B
Python
26 lines
581 B
Python
import math
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def jump_search(arr, x):
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n = len(arr)
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step = int(math.floor(math.sqrt(n)))
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prev = 0
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while arr[min(step, n)-1] < x:
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prev = step
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step += int(math.floor(math.sqrt(n)))
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if prev >= n:
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return -1
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while arr[prev] < x:
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prev = prev + 1
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if prev == min(step, n):
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return -1
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if arr[prev] == x:
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return prev
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return -1
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arr = [ 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610]
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x = 55
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index = jump_search(arr, x)
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print("\nNumber " + str(x) +" is at index " + str(index));
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