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ID Problem Show tags Hide tags AC / Tried Difficulty
2727 P2727  一、彩虹密码 2 / 2 10
2728 P2728  二、神奇的幻方 2 / 14 9
2729 P2729  三、迷宫 1 / 16 10
2730 P2730  四、距离的智慧 2 / 4 10
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