From 30b5ba4390d10223b09848350de303f85a4730f5 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Wed, 5 Aug 2020 16:25:29 +0800
Subject: Add problem 203 .

---
 cpp/203.cpp | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 cpp/203.cpp

(limited to 'cpp')

diff --git a/cpp/203.cpp b/cpp/203.cpp
new file mode 100644
index 0000000..0f1bb55
--- /dev/null
+++ b/cpp/203.cpp
@@ -0,0 +1,48 @@
+#include <cstddef>
+
+struct ListNode
+{
+    int val;
+    ListNode *next;
+    ListNode(int x) : val(x), next(NULL) {}
+};
+
+class Solution
+{
+public:
+    ListNode *removeElements(ListNode *head, int val)
+    {
+        if (head == NULL)
+            return NULL;
+
+        ListNode *last = NULL;
+        ListNode *current = head;
+
+        while (current != NULL)
+        {
+            if (current->val == val)
+            {
+                if (last == NULL)
+                {
+                    auto temp = current;
+                    current = current->next;
+                    head = current;
+                    delete temp;
+                }
+                else
+                {
+                    auto temp = current;
+                    current = current->next;
+                    last->next = current;
+                    delete temp;
+                }
+            }
+            else
+            {
+                last = current;
+                current = current->next;
+            }
+        }
+        return head;
+    }
+};
-- 
cgit v1.2.3