Detect a Cycle in Linked List

You are given a linked list. Determine if there is a cycle in it. A cycle is present if a node's next points to an earlier node in the list. Your task is to output 'Yes' if a cycle exists and 'No' otherwise. Input format: - The first line contains an integer n (0 <= n <= 100), the number of nodes. - The second line contains n space-separated integers representing the values of the nodes. - The third line contains two integers u and v (1 <= u, v <= n), indicating that the node u points to node v, thus forming a cycle (0, 0) if no cycle exists. Output format: - 'Yes' if a cycle exists, otherwise 'No'. Example: Input: 3 1 2 3 1 2 Output: Yes