Blog entries by technology: Một đoạn con được gọi là \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'unique\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\' nếu đoạn con đó chứa toàn phần tử khác nhau. Mỗi truy vấn bao gồm 2 số nguyên l,r , bạn cần tìm ra đoạn con dài nhất trong đoạn từ al,...,ar sao cho đoạn con đó là đoạn \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'unique\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'.

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