使用双指针 function FindKthToTail( pHead , k ) { // write code here let fast = pHead, slow = pHead; while (fast && k > 0) { [fast, k] = [fast.next, k - 1]; } //如果k大于链表长度 if(k > 0) return null; while (fast) { [fast, slow] = [fast.next, slow.nex...