deno.land / x / masx200_leetcode_test@10.6.5 / linked-list-cycle-ii / index.ts
1234567891011121314151617import { ListNode } from "../reverse-linked-list/ListNode.ts";
export default function detectCycle(head: ListNode | null): ListNode | null { if (!head) return head; const cache = new Set<ListNode>();
while (head) { if (cache.has(head)) { return head; } else { cache.add(head); } head = head.next; } return null;}
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