LeetCode "Balanced Binary Tree"

class Solution {
public:
    int getHeight(TreeNode *p)
    {
        if (!p) return 0;

        int hL = 1;
        if (p->left) hL = 1 + getHeight(p->left);
        int hR = 1;
        if (p->right) hR = 1 + getHeight(p->right);

        return (hL > hR ? hL : hR);
    }
    bool isBalanced(TreeNode *root) {
        if (!root || (!root->left && !root->right)) return true;

        bool bLeft = isBalanced(root->left);
        if (!bLeft) return false;
        bool bRight = isBalanced(root->right);
        if (!bRight) return false;
        {
            int hL = getHeight(root->left);
            int hR = getHeight(root->right);
            if (abs(hL - hR) < 2) return true;
        }
        return false;
    }
};