mirror of
https://github.com/krahets/hello-algo.git
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Fix Repo
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@@ -44,21 +44,7 @@ comments: true
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=== "C++"
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```cpp title="binary_search_tree.cpp"
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/* 查找结点 */
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TreeNode* search(int num) {
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TreeNode* cur = root;
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// 循环查找,越过叶结点后跳出
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while (cur != nullptr) {
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// 目标结点在 cur 的右子树中
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if (cur->val < num) cur = cur->right;
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// 目标结点在 cur 的左子树中
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else if (cur->val > num) cur = cur->left;
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// 找到目标结点,跳出循环
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else break;
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}
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// 返回目标结点
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return cur;
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}
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[class]{BinarySearchTree}-[func]{search}
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```
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=== "Python"
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@@ -212,27 +198,7 @@ comments: true
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=== "C++"
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```cpp title="binary_search_tree.cpp"
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/* 插入结点 */
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TreeNode* insert(int num) {
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// 若树为空,直接提前返回
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if (root == nullptr) return nullptr;
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TreeNode *cur = root, *pre = nullptr;
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// 循环查找,越过叶结点后跳出
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while (cur != nullptr) {
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// 找到重复结点,直接返回
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if (cur->val == num) return nullptr;
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pre = cur;
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// 插入位置在 cur 的右子树中
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if (cur->val < num) cur = cur->right;
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// 插入位置在 cur 的左子树中
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else cur = cur->left;
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}
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// 插入结点 val
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TreeNode* node = new TreeNode(num);
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if (pre->val < num) pre->right = node;
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else pre->left = node;
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return node;
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}
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[class]{BinarySearchTree}-[func]{insert}
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```
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=== "Python"
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@@ -465,53 +431,9 @@ comments: true
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=== "C++"
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```cpp title="binary_search_tree.cpp"
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/* 删除结点 */
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TreeNode* remove(int num) {
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// 若树为空,直接提前返回
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if (root == nullptr) return nullptr;
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TreeNode *cur = root, *pre = nullptr;
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// 循环查找,越过叶结点后跳出
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while (cur != nullptr) {
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// 找到待删除结点,跳出循环
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if (cur->val == num) break;
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pre = cur;
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// 待删除结点在 cur 的右子树中
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if (cur->val < num) cur = cur->right;
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// 待删除结点在 cur 的左子树中
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else cur = cur->left;
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}
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// 若无待删除结点,则直接返回
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if (cur == nullptr) return nullptr;
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// 子结点数量 = 0 or 1
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if (cur->left == nullptr || cur->right == nullptr) {
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// 当子结点数量 = 0 / 1 时, child = nullptr / 该子结点
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TreeNode* child = cur->left != nullptr ? cur->left : cur->right;
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// 删除结点 cur
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if (pre->left == cur) pre->left = child;
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else pre->right = child;
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}
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// 子结点数量 = 2
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else {
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// 获取中序遍历中 cur 的下一个结点
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TreeNode* nex = getInOrderNext(cur->right);
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int tmp = nex->val;
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// 递归删除结点 nex
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remove(nex->val);
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// 将 nex 的值复制给 cur
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cur->val = tmp;
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}
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return cur;
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}
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[class]{BinarySearchTree}-[func]{remove}
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/* 获取中序遍历中的下一个结点(仅适用于 root 有左子结点的情况) */
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TreeNode* getInOrderNext(TreeNode* root) {
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if (root == nullptr) return root;
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// 循环访问左子结点,直到叶结点时为最小结点,跳出
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while (root->left != nullptr) {
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root = root->left;
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}
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return root;
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}
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[class]{BinarySearchTree}-[func]{getInOrderNext}
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```
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=== "Python"
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