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problems(cpp): add „1448. Count Good Nodes in Binary Tree“

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Signed-off-by: Matej Focko <mfocko@redhat.com>
This commit is contained in:
Matej Focko 2022-09-09 18:59:12 +02:00
parent f7ebb9037d
commit dd94963a2f
Signed by: mfocko
GPG key ID: 7C47D46246790496
1 changed files with 28 additions and 0 deletions
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problems/count-good-nodes-in-binary-tree.cpp Normal file
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/**
* Definition for a binary tree node.
* struct TreeNode {
* int val;
* TreeNode *left;
* TreeNode *right;
* TreeNode() : val(0), left(nullptr), right(nullptr) {}
* TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
* TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}
* };
*/
class Solution {
int goodNodes(TreeNode* root, int m)
{
if (root == nullptr) {
return 0;
}
int new_max = std::max(m, root->val);
return (root->val >= m) + goodNodes(root->left, new_max) + goodNodes(root->right, new_max);
}
public:
int goodNodes(TreeNode* root)
{
return goodNodes(root, INT_MIN);
}
};