Delete Leaves With a Given Value

Leetcode-1325.cpp

class Solution {
public:
    TreeNode* removeLeafNodes(TreeNode* root, int target) {
        if (root == NULL)
            return NULL;

        root->left = removeLeafNodes(root->left, target);
        root->right = removeLeafNodes(root->right, target);

        if (root->left == NULL && root->right == NULL && root->val == target)
            return NULL;

        return root;
    }
};