题解 | #二叉树的镜像#

/*
 * function TreeNode(x) {
 *   this.val = x;
 *   this.left = null;
 *   this.right = null;
 * }
 */
/**
 * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
 *
 * 
 * @param pRoot TreeNode类 
 * @return TreeNode类
 */
function Mirror( pRoot ) {
    // write code here
    if (pRoot) {
        let tem = pRoot.left
        pRoot.left = pRoot.right
        pRoot.right = tem
        Mirror(pRoot.left)
        Mirror(pRoot.right)
    }
    return pRoot
}
module.exports = {
    Mirror : Mirror
};