黑馬博學谷順風車實戰(zhàn)訓練營
public boolean fastSlowPoint(ListNode head) {
? ?if (head == null) {
? ? ? ?return false;
? ?}
? ?ListNode fast = head;
? ?ListNode slow = head;
? ?while (fast != null && fast.next != null) {
? ? ? ?fast = fast.next.next;
? ? ? ?slow = slow.next;
? ? ? ?// do something
? ?}}
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