From 4798f819f8314899cebbedc21cda42641f760d4b Mon Sep 17 00:00:00 2001
From: Gemini <15597921+Geminiquq@user.noreply.gitee.com>
Date: Tue, 15 Apr 2025 03:24:23 +0000
Subject: [PATCH] update src/exercise-21/task_queue.c.

Signed-off-by: Gemini <15597921+Geminiquq@user.noreply.gitee.com>
---
 src/exercise-21/task_queue.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/exercise-21/task_queue.c b/src/exercise-21/task_queue.c
index 39dc2f6..cdf82d4 100644
--- a/src/exercise-21/task_queue.c
+++ b/src/exercise-21/task_queue.c
@@ -44,7 +44,7 @@ reverse_task_queue_by_group (TaskNode *head, int k)
           tail = tail->next;
           if (tail == NULL)
             {
-              // 在这里填写代码
+              return hair->next;
             }
         }
 
@@ -55,12 +55,14 @@ reverse_task_queue_by_group (TaskNode *head, int k)
       while (prev != tail)
         {
           TaskNode *temp = p->next;
-          // 在这里填写代码
+          p->next = prev;
+          prev = p;
+          p = temp;
         }
 
       pre->next = tail;
-
-      // 在这里填写代码
+      
+      pre = head;
 
       head = next;
     }
-- 
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