17 lines
338 B
Python
17 lines
338 B
Python
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def main() -> None:
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# Config
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arr = ["а", "b", "с", "d", "с", "е", "f"]
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# Main code
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some_dict = {}
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for index in range(len(arr)):
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if some_dict.get(arr[index]) is not None:
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print(arr[index])
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break
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some_dict[arr[index]] = index
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if __name__ == "__main__":
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main()
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