### Question

Given two binary trees, write a function to check if they are equal or not.

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

### Stats

Frequency | 1 |

Difficulty | 1 |

Adjusted Difficulty | 1 |

Time to use | -------- |

Ratings/Color = 1(white) 2(lime) 3(yellow) 4/5(red)

### Analysis

**This is an easy one**

### Code

```
public boolean isSameTree(TreeNode p, TreeNode q) {
if (p == null && q == null)
return true;
if (p == null || q == null)
return false;
if (p.val == q.val)
return isSameTree(p.left, q.left)
&& isSameTree(p.right, q.right);
return false;
}
```