题解 | #二叉树的镜像#
二叉树的镜像
https://www.nowcoder.com/practice/a9d0ecbacef9410ca97463e4a5c83be7
/*
* 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 swap(pRoot){
if(pRoot == null){
return null
}
swap(pRoot.left);
swap(pRoot.right)
// let mid = new TreeNode(pRoot.left.val);
// console.log("mid",mid);
let mid = pRoot.left;
pRoot.left = pRoot.right;
pRoot.right = mid;
return pRoot
}
function Mirror( pRoot ) {
// write code here
// if(pRoot == null){
// return null
// }
// Mirror(pRoot.left);
// Mirror(pRoot.right)
// // let mid = new TreeNode(pRoot.left.val);
// // console.log("mid",mid);
// let mid = pRoot.left;
// pRoot.left = pRoot.right;
// pRoot.right = mid;
// return pRoot
return swap(pRoot)
}
module.exports = {
Mirror : Mirror
};
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