From 93a4aef31b3012a4a0938a557c88e2a09032ea98 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Wed, 5 Aug 2020 16:49:09 +0800
Subject: import(solutions): Add problem 328.

---
 works/solutions/cpp/328.cpp | 51 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 works/solutions/cpp/328.cpp

(limited to 'works/solutions/cpp/328.cpp')

diff --git a/works/solutions/cpp/328.cpp b/works/solutions/cpp/328.cpp
new file mode 100644
index 0000000..de3ad0b
--- /dev/null
+++ b/works/solutions/cpp/328.cpp
@@ -0,0 +1,51 @@
+struct ListNode
+{
+    int val;
+    ListNode *next;
+    ListNode() : val(0), next(nullptr) {}
+    ListNode(int x) : val(x), next(nullptr) {}
+    ListNode(int x, ListNode *next) : val(x), next(next) {}
+};
+
+class Solution
+{
+public:
+    ListNode *oddEvenList(ListNode *head)
+    {
+        if (head == nullptr)
+            return nullptr;
+
+        if (head->next == nullptr)
+            return head;
+
+        ListNode *odd_head = head;
+        head = head->next;
+        ListNode *even_head = head;
+        head = head->next;
+
+        ListNode *odd_current = odd_head;
+        ListNode *even_current = even_head;
+
+        bool odd = true;
+        while (head != nullptr)
+        {
+            if (odd)
+            {
+                odd_current->next = head;
+                odd_current = head;
+            }
+            else
+            {
+                even_current->next = head;
+                even_current = head;
+            }
+            head = head->next;
+            odd = !odd;
+        }
+
+        odd_current->next = even_head;
+        even_current->next = nullptr;
+
+        return odd_head;
+    }
+};
-- 
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