解题：Leetcode100题:SameTree

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