Tree Sum of nodes with one sun
Easy
Execution time limit is 1 second
Runtime memory usage limit is 128 megabytes
Given a binary search tree. Find the sum of all its nodes with only one child (either left or right).
Definition of a tree:
// Java
class TreeNode
{
public:
int val;
TreeNode left;
TreeNode right;
TreeNode(int x) {
val = x;
left = NULL;
right = NULL;
};// C++
class TreeNode
{
public:
int val;
TreeNode *left;
TreeNode *right;
TreeNode(int x) : val(x), left(NULL), right(NULL) {}
};Implement the function sumOneSon that returns the sum of all nodes in the tree that have only one child. If the given tree has no nodes with a single child, return .
// Java int sumOneSon(TreeNode tree) // C++ int sumOneSon(TreeNode *tree)
Note
The function sumOneSon returns .
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