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感觉不会有NO的情况,不满足堆的性质时可以旋转。不过假如有节点的priority相等的话,貌似又可能有NO的。说这个是cartesian tree感觉更像treap

Posted by frkstyc at 2005-04-05 18:08:39 on Problem 2201
In Reply To:WA了。不理解什么时候会NO的?感觉自己的算法没问题。 Posted by:Jin_j_y at 2005-04-05 16:26:40
> 我用二分法做的,感觉不会出现“NO”的情况。
> 可是我的程序WA了。我的算法是这样的
> 
> int DC(int low,int high,int father){
> 	if(low==high)return 0;
> 	
> 	//为了满足堆序性,
> 	//找出[low..high)序列中含有最小a值的元素minp。
> 
> 	//为了满足二叉排序树的性质,
> 	//把[low..high)序列按照minp的k值分成两个子集,
> 	//[low..temp)中的所有k值都小于minp的k值,
> 	//[temp..high)的所有k值都大于minp的k值。
> 
> 	int left=DC(low,temp,minp);
> 	int right=DC(temp+1,high,minp);
> 
> 	//确定当前minp结点的父亲,左右儿子
> 
> 	return minp;
> }

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