Java for LeetCode 100 Same Tree

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.

解题思路：

JAVA实现如下：

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