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package cn.lspj.ch1.base;

public class CheckSameTree {

    public static 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;
    }

    static class TreeNode {
        int val;
        TreeNode left;
        TreeNode right;
        TreeNode(int x) { val = x; }
    }

    public static void main(String[] args) {
        TreeNode pRoot = new TreeNode(1);
        TreeNode pLeft = new TreeNode(2);
        TreeNode pRight = new TreeNode(3);
        pRoot.left = pLeft;
        pRoot.right = pRight;

        TreeNode qRoot = new TreeNode(1);
        TreeNode qLeft = new TreeNode(2);
        TreeNode qRight = new TreeNode(3);
        qRoot.left = qLeft;
        qRoot.right = qRight;
        System.out.println(isSameTree(pRoot,qRoot));
    }

}