给出一个循环的双向链表...如何将其转换为二进制搜索树..
问题发现于 http://rajeevprasanna.blogspot.com/2011/02/convert-binary-tree-into-doubly-linked.html
我试着写相同的代码,但它窒息!!拜托,这里的一些建议会很好。另外,我如何找到链表的中间..请谈谈代码(C或C ++代码),如果可能的话,小例子也可以。
通过我上面提供的文章(URL),BST到Linked List是一个很好的练习。我试着跟随同一个校长,但我的课程窒息......请帮忙......
Node ListToTree(Node head)
{
if(head == NULL)
return NULL;
Node hleft = NULL, hright = NULL;
Node root = head;
hleft = ListToTree(head->left);
head->left = NULL;
root->left = hleft;
hright = ListToTree(head->right);
head->right = NULL;
root->right = hright;
return root;
}
答案 0 :(得分:1)
class Node {
Node *prev, *next;
int value;
}
void listToTree(Node * head) {
if (head == null)
return;
if (head->next == head) {
head->prev = null;
head->next = null;
return head;
}
if (head->next->next == head) {
head->prev = null;
head->next->next = null;
head->next->prev = null;
return head;
}
Node *p1 = head, *p2 = head->prev;
while (p1->value < p2.value)
p1 = p1->next, p2 = p2->prev;
Node * root = p1;
root->prev->next = head;
root->next->prev = head->prev;
root->prev = listToTree(head);
root->next = listToTree(root->next);
return root;
}