Merge pull request youngyangyang04#620 from leiyaguang/patch-1

Update 0102.二叉树的层序遍历.md

Author: youngyangyang04

problems/0102.二叉树的层序遍历.md

@@ -1129,7 +1129,7 @@ var largestValues = function(root) {
     queue.push(root);
     while(root!==null&&queue.length){
         //设置max初始值就是队列的第一个元素
-        let max=queue[0];
+        let max=queue[0].val;
         let length=queue.length;
         while(length--){
             let node = queue.shift();