## 第三次（7/9） --- - [A. 後花園](https://hackmd.io/@problem-solved-sgroup/rkPkRab0d) - [B. 公寓出租](https://hackmd.io/@problem-solved-sgroup/B144CTbAu) - [C. 摩斯電碼](https://hackmd.io/@problem-solved-sgroup/ByoSATZCO) - [D. 兩數之和](https://hackmd.io/@problem-solved-sgroup/BJ3D0pZRu)
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