牙齿健康的常识, 以及常见牙科手术的说明, 包括补牙(Tooth filling), 拔智齿(Wisdom Teeth Extraction), 根管治疗(Root canal therapy).

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174. Dungeon Game

The demons had captured the princess and imprisoned her in the bottom-right corner of a dungeon. The dungeon consists of m x n rooms laid out in a 2D grid. Our valiant knight was initially positioned in the top-left room and must fight his way through dungeon to rescue the princess.

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