From 5967e15849e339dcbf22f011560fcfe20a610bf7 Mon Sep 17 00:00:00 2001
From: Keisuke KUDO <151166401+Apo-Matchbox@users.noreply.github.com>
Date: Mon, 9 Mar 2026 14:40:46 -0400
Subject: [PATCH] 83. shadowing

---
 83/83. shadowing.md | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 83/83. shadowing.md

diff --git a/83/83. shadowing.md b/83/83. shadowing.md
new file mode 100644
index 0000000..0a0a0ca
--- /dev/null
+++ b/83/83. shadowing.md	
@@ -0,0 +1,32 @@
+# # [83] (https://leetcode.com/problems/remove-duplicates-from-sorted-list/)
+# C++
+
+```cpp
+#include <iostream>
+
+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* deleteDuplicates(ListNode* head) {
+        ListNode* node = head;
+
+        while (node != nullptr && node->next != nullptr) {
+            if (node->val == node->next->val) {
+                node->next = node->next->next;
+            }
+            else {
+                node = node->next;
+            }
+        }
+        return head;
+    }
+
+};
+```