# 二叉树节点定义classTreeNode:def__init__(self,val):self.val=val self.left=None self.right=None # 二叉树的DFS遍历 defdfs_binary_tree(root):ifroot is None:returnprint(root.val,end=' ')dfs_binary_tree(root.left)dfs_binary_tree(root.right)# 构造二叉树 root=TreeNode(1)root.left=Tree...
代码(Python3) # Definition for a binary tree root. # class TreeNode: # def __init__(self, val=0, left=None, right=None): # self.val = val # self.left = left # self.right = right class Solution: def pruneTree(self, root: Optional[TreeNode]) -> Optional[TreeNode]: # 如果 ...
代码(Python3) # Definition for a binary tree node. # class TreeNode: # def __init__(self, val=0, left=None, right=None): # self.val = val # self.left = left # self.right = right class Solution: def rightSideView(self, root: Optional[TreeNode]) -> List[int]: # ans 用于...
python代码: class TreeNode: def __init__(self, val=0, left=None, right=None): self.val = val self.left = left self.right = right class Solution: def pseudoPalindromicPaths (self, root: TreeNode): self.ass=[0,0,0,0,0,0,0,0,0,0] #计数路径中数字的个数 self.res=0 #记录符...
visited = {node: False for node in graph} # 从节点A开始进行DFS遍历 print("DFS遍历结果:") dfs(graph, 'A', visited) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23.
@param root: param root: The root of the binary search tree @param k1: An integer @param k2: An integer @return: return: Return all keys that k1<=key<=k2 in ascending order """ def searchRange(self, root, k1, k2): # write your code here """ # recursive solution if not root...
("\n"); } // 中序遍历非递归 void BinaryTreeInOrderNonR(BTNode* root) { BTNode* cur = root; BTNode* top,* prev; Stack st; StackInit(&st); while (cur || StackEmpty(&st) == 0) { while (cur) { StackPush(&st, cur); cur = cur->_left; } top = StackTop(&st); ...
inorder保证为二叉树的中序遍历序列 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 # Definition for a binary tree node. # class TreeNode: # def __init__(self, val=0, left=None, right=None): ...
TOP 200 #Dev 🏆 LeetCode, Solutions in Swift, Shell, Database (T-SQL, PL/SQL, MySQL), Concurrency (Python3). @ S. Leschev. Google Engineering Level: L6+ shellswifttreesqllinked-liststackqueueoraclehashsortdfsheapbfshash-tablebinary-searcht-sqltwo-pointerssliding-windowgreedy-problems...
This repo is a small repo meant to practice implementing three depth first searches for a binary search tree. The TreeNode class has been written for you along with some starter code for the Tree class. You are tasked with writing an implementation for the preorder, inorder and postorder tr...