Method isSameTree

TreeSameTree.java:2–11

(TreeNode p, TreeNode q)

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