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请问下是不是一个节点只能伸出一条有向边呢

Posted by hduOZ at 2007-07-09 17:13:43 on Problem 3237
如if(a-->b)将不存在第二组数据a-->c了;
因为里面有个CHANGE 说是把a原来指向的那条路的长度复制给新指向的路;也就是if(a-->b)且长度为3;
则CHANGE a c  是不是意味这a--->c 且长度为3,a已不指向b了????

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