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虽然AC了不过还是想请教输入. 数据输入的时候为了转化成树,怎么做才快呢?我的方法是做循环链表,读取第1组数据,然后后面的数据如果有前面的关键字那么读取,然后删去,若未读则跳过.感觉这样好慢..Followed by:
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