17 lines
382 B
Python
17 lines
382 B
Python
import random
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def find_duplicate(xs):
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mini, maxi, acc = xs[0], xs[0], xs[0]
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for i in range(1, len(xs)):
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mini = min(mini, xs[i])
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maxi = max(maxi, xs[i])
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acc = acc ^ xs[i]
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mask = mini
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for i in range(mini + 1, maxi + 1):
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mask = mask ^ i
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return mask ^ acc
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xs = [5, 3, 4, 1, 5, 2]
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print(xs)
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result = find_duplicate(xs)
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print(result)
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