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