Create Problems.md

Week 4/Problems.md

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+# Linked List questions for Week 3
+
+## Level: Easy
+
+https://practice.geeksforgeeks.org/problems/detect-loop-in-linked-list/1
+
+https://practice.geeksforgeeks.org/problems/finding-middle-element-in-a-linked-list/1
+
+https://practice.geeksforgeeks.org/problems/check-if-linked-list-is-pallindrome/1
+
+https://practice.geeksforgeeks.org/problems/reverse-a-linked-list/1
+
+https://practice.geeksforgeeks.org/problems/intersection-point-in-y-shapped-linked-lists/1
+
+https://practice.geeksforgeeks.org/problems/merge-two-sorted-linked-lists/1
+
+https://practice.geeksforgeeks.org/problems/remove-duplicate-element-from-sorted-linked-list/1
+
+https://practice.geeksforgeeks.org/problems/delete-keys-in-a-linked-list/1
+
+
+
+## Level: Medium
+
+
+
+https://practice.geeksforgeeks.org/problems/delete-without-head-pointer/1
+
+https://practice.geeksforgeeks.org/problems/add-two-numbers-represented-by-linked-lists/1
+
+https://www.geeksforgeeks.org/delete-nth-node-from-the-end-of-the-given-linked-list/
+
+https://practice.geeksforgeeks.org/problems/reorder-list/1
+
+https://practice.geeksforgeeks.org/problems/sort-a-linked-list/1
+
+
+
+
+
+