# 101. Same Tree | LeetCode | Trees | DSA

Given the roots of two binary trees p and q, write a function to check if they are the same or not.

Two binary trees are considered the same if they are structurally identical, and the nodes have the same value.

Example 1:

Input: p = [1,2,3], q = [1,2,3] Output: true

Example 2:

Input: p = [1,2], q = [1,null,2] Output: false

Example 3:

Input: p = [1,2,1], q = [1,1,2] Output: false

```
class Solution {
public:
bool isSameTree(TreeNode* p, TreeNode* q) {
return !p && !q || p && q && p->val == q->val && isSameTree(p->left, q->left) && isSameTree(p->right, q->right);
}
};
```