Merge pull request #95 from Ibraam-Nashaat/main

Create 19-Remove-Nth-Node-From-End-of-List.cpp

Author: neetcode-gh

cpp/19-Remove-Nth-Node-From-End-of-List.cpp

@@ -0,0 +1,34 @@
+/**
+ * Definition for singly-linked list.
+ * 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* removeNthFromEnd(ListNode* head, int n) {
+        if(!head) return head;
+        ListNode* f,*s,*prev;
+        f=head;
+        s=head;
+        prev=nullptr;
+        for(int i=0;i<n;i++)
+             f=f->next;
+        while(f)
+        {
+            prev=s;
+            s=s->next;
+            f=f->next;
+        }
+        if(prev)
+            prev->next=s->next;
+        else
+            head=head->next;
+        delete s;
+        return head;
+    }
+};