*/classSolution{public:intsumNumbers(TreeNode* root){if(root==NULL)return0;returnDFS(root,0); }intDFS(TreeNode* root,intcursum){intleftsum=0,rightsum=0;if(root->left==NULL&&root->right==NULL){returncursum+root->val; }if(root->left!=NULL){ leftsum=DFS(root->left,10*(cursum+r...
}intsumNumbers(TreeNode* root){intres =0, cur =0;sumNumbers(root, cur, res);returnres; } };
Find the total sum of all root-to-leaf numbers. For example, 1 / \ 2 3 The root-to-leaf path 1->2 represents the number 12. The root-to-leaf path 1->3 represents the number 13.Return the sum = 12 + 13 = 25...
=nil{result+=dfs(root.Left,pathSum+root.Left.Val)}// 如果右子结点不为空,则递归处理右子结点ifroot.Right!=nil{result+=dfs(root.Right,pathSum+root.Right.Val)}returnresult} 题目链接: Sum Root to Leaf Numbers : https://leetcode.com/problems/sum-root-to-leaf-numbers/ 求根节点到叶节点数...
{ * this.val = val; * this.left = this.right = null; * } * } */ public class Solution { /** * @param root: the root of the tree * @return: the total sum of all root-to-leaf numbers */ class Result { int sum; List<Node> nodes; Result() { this.sum = 0; this....
int sumNumbers(TreeNode *root) { //把二叉树遍历一遍,把遍历的路径值存放在叶子节点中,用sum值保存叶子节点的值' if (!root) { return 0; } int sum = 0; travel(root, sum); return sum; } void travel(TreeNode *root, int ∑) {
The root-to-leaf path 1->3 represents the number 13. Return the sum = 12 + 13 =25. 思路 求根节点到叶节点的路径组合数字之和,如上样例。 前序遍历该树,定义一个方法,表示当前节点到所有叶节点的组合数字和,其中当前值为sum。当节点为空时返回0,否则计算到此节点的组合数字;当该节点为叶节点时返...
Each root-to-leaf path in the tree represents a number. For example, the root-to-leaf path 1 -> 2 -> 3 represents the number 123. Returnthe total sum of all root-to-leaf numbers. Test cases are generated so that the answer will fit in a32-bitinteger. ...
public int sumNumbers(TreeNode root) { return getSum(root, 0); } private int getSum(TreeNode root, int curSum) { // condition if(root == null) { return 0; } curSum = curSum*10 + root.val; if(root.left==null && root.right==null) { return curSum; } // recursion return ...
129. Sum Root to Leaf Numbers Given a binary tree containing digits from0-9only, each root-to-leaf path could represent a number. An example is the root-to-leaf path1->2->3which represents the number123. Find the total sum of all root-to-leaf numbers. ...