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不用dijstra不行吗？

Posted by cug_fish2008 at 2010-05-19 21:04:41 on Problem 1603 
for(i=1;i<=20;i++){
  for(j=i+1;j<=20;j++){
    for(k=1;k<=20;k++){
	if(d[i][j] > d[i][k]+d[k][j])
	  d[j][i]=d[i][j] = d[i][k]+d[k][j];
	}
   }
}
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