64 lines
1.3 KiB
C++
64 lines
1.3 KiB
C++
/*
|
|
* File: PrintUtil.hpp
|
|
* Created Time: 2021-12-19
|
|
* Author: Krahets (krahets@163.com)
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
/**
|
|
* @brief Definition for a binary tree node
|
|
*
|
|
*/
|
|
struct TreeNode {
|
|
int val;
|
|
TreeNode *left;
|
|
TreeNode *right;
|
|
TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
|
|
};
|
|
|
|
/**
|
|
* @brief Generate a binary tree with a vector
|
|
*
|
|
* @param list
|
|
* @return TreeNode*
|
|
*/
|
|
TreeNode* vectorToTree(vector<int>& list) {
|
|
TreeNode *root = new TreeNode(list[0]);
|
|
queue<TreeNode*> que;
|
|
que.emplace(root);
|
|
int i = 1;
|
|
while(!que.empty()) {
|
|
TreeNode *node = que.front();
|
|
que.pop();
|
|
if(list[i] != INT_MAX) {
|
|
node->left = new TreeNode(list[i]);
|
|
que.emplace(node->left);
|
|
}
|
|
i++;
|
|
if(list[i] != INT_MAX) {
|
|
node->right = new TreeNode(list[i]);
|
|
que.emplace(node->right);
|
|
}
|
|
i++;
|
|
}
|
|
return root;
|
|
}
|
|
|
|
/**
|
|
* @brief Get a tree node with specific value in a binary tree
|
|
*
|
|
* @param root
|
|
* @param val
|
|
* @return TreeNode*
|
|
*/
|
|
TreeNode* getTreeNode(TreeNode *root, int val) {
|
|
if (root == nullptr)
|
|
return nullptr;
|
|
if (root->val == val)
|
|
return root;
|
|
TreeNode *left = getTreeNode(root->left, val);
|
|
TreeNode *right = getTreeNode(root->right, val);
|
|
return left != nullptr ? left : right;
|
|
}
|