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这个Case答案应该是啥= =1 6 6 ###### #A # # S# #A # ###### ###### 感觉应该是5... 从S开始 左左左 分成两组一个上一个下 5=3+1+1 but...我的AC代码跑出了6... 这不应该是斯坦纳树么= = Followed by:
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