From 7a62a75e399325cf439eebf507e8ce2d576e618d Mon Sep 17 00:00:00 2001
From: ZongqinWang <1722249371@qq.com>
Date: Thu, 19 May 2022 12:59:45 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=20117.=E5=A1=AB=E5=85=85?=
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---
 problems/0102.二叉树的层序遍历.md | 29 +++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/problems/0102.二叉树的层序遍历.md b/problems/0102.二叉树的层序遍历.md
index 18fdfcb3..a2130f7e 100644
--- a/problems/0102.二叉树的层序遍历.md
+++ b/problems/0102.二叉树的层序遍历.md
@@ -1998,6 +1998,35 @@ func connect(_ root: Node?) -> Node? {
 }
 ```
 
+Scala:
+```scala
+// 117.填充每个节点的下一个右侧节点指针II
+object Solution {
+  import scala.collection.mutable
+
+  def connect(root: Node): Node = {
+    if (root == null) return root
+    val queue = mutable.Queue[Node]()
+    queue.enqueue(root)
+    while (!queue.isEmpty) {
+      val len = queue.size
+      val tmp = mutable.ListBuffer[Node]()
+      for (i <- 0 until len) {
+        val curNode = queue.dequeue()
+        tmp.append(curNode)
+        if (curNode.left != null) queue.enqueue(curNode.left)
+        if (curNode.right != null) queue.enqueue(curNode.right)
+      }
+      // 处理next指针
+      for (i <- 0 until tmp.size - 1) {
+        tmp(i).next = tmp(i + 1)
+      }
+      tmp(tmp.size-1).next = null
+    }
+    root
+  }
+}
+```
 # 104.二叉树的最大深度
 
 [力扣题目链接](https://leetcode-cn.com/problems/maximum-depth-of-binary-tree/)