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第一道并查集题,留念

Posted by yuanchuanshun at 2010-08-22 09:09:32 on Problem 1988
for(i=1;i<arr;i++) father[i]=i,num[i]=1,dis[i]=0;
       //////上面写i<=N就Runtime Error;
初始化必须开到最大。。。。我就给RE了两次

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