From e276a099cd0ed0666017944b06156702210bd02f Mon Sep 17 00:00:00 2001
From: Ace-Krypton <ramizna@code.edu.az>
Date: Wed, 13 Sep 2023 21:40:39 +0200
Subject: [PATCH] Added Remove Nth Node From End of List

---
 CMakeLists.txt                                | 11 +++++
 .../include/solution.hpp                      | 40 +++++++++++++++++++
 .../RemoveNthNodeFromEndOfList/tests/test.cpp | 17 ++++++++
 3 files changed, 68 insertions(+)
 create mode 100644 Medium/RemoveNthNodeFromEndOfList/include/solution.hpp
 create mode 100644 Medium/RemoveNthNodeFromEndOfList/tests/test.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0323b4f..6da1805 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -678,4 +678,15 @@ add_executable(PalindromeLinkedList
 target_link_libraries(
         PalindromeLinkedList
         GTest::gtest_main
+)
+
+# Remove Nth Node From End Of List
+add_executable(RemoveNthNodeFromEndOfList
+        Medium/RemoveNthNodeFromEndOfList/include/solution.hpp
+        Medium/RemoveNthNodeFromEndOfList/tests/test.cpp
+)
+
+target_link_libraries(
+        RemoveNthNodeFromEndOfList
+        GTest::gtest_main
 )
\ No newline at end of file
diff --git a/Medium/RemoveNthNodeFromEndOfList/include/solution.hpp b/Medium/RemoveNthNodeFromEndOfList/include/solution.hpp
new file mode 100644
index 0000000..67f222a
--- /dev/null
+++ b/Medium/RemoveNthNodeFromEndOfList/include/solution.hpp
@@ -0,0 +1,40 @@
+#pragma once
+
+#include <vector>
+#include <iostream>
+#include <algorithm>
+#include <gtest/gtest.h>
+
+struct ListNode {
+    int32_t value;
+    ListNode *next;
+};
+
+class Solution {
+public:
+    static auto remove_Nth_from_end(ListNode *head, int32_t n) -> ListNode* {
+        auto *dummy = new ListNode(0);
+        dummy->next = head;
+        ListNode *slow = dummy, *fast = dummy;
+        for (std::size_t i = 0; i <= n; ++i) fast = fast->next;
+        while (fast) slow = slow->next, fast = fast->next;
+        slow->next = slow->next->next;
+        head = dummy->next;
+        delete dummy;
+        return head;
+    }
+
+    static auto insert(ListNode **head_ref, int32_t new_value) -> void {
+        auto *node = new ListNode();
+        node->value = new_value;
+        node->next = (*head_ref);
+        (*head_ref) = node;
+    }
+
+    static auto print(ListNode *head) -> void {
+        while (head != nullptr) {
+            std::cout << head->value << ' ';
+            head = head->next;
+        }
+    }
+};
diff --git a/Medium/RemoveNthNodeFromEndOfList/tests/test.cpp b/Medium/RemoveNthNodeFromEndOfList/tests/test.cpp
new file mode 100644
index 0000000..0133059
--- /dev/null
+++ b/Medium/RemoveNthNodeFromEndOfList/tests/test.cpp
@@ -0,0 +1,17 @@
+#include "../include/solution.hpp"
+
+auto main() -> int {
+    ListNode *node = nullptr;
+    Solution::insert(&node, 5);
+    Solution::insert(&node, 4);
+    Solution::insert(&node, 3);
+    Solution::insert(&node, 2);
+    Solution::insert(&node, 1);
+
+    Solution::print(node);
+    std::cout << '\n';
+    Solution::remove_Nth_from_end(node, 2);
+    Solution::print(node);
+
+    return 0;
+}