/* * function ListNode(x){ * this.val = x; * this.next = null; * } */ /** * 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可 * * * @param head ListNode类 * @return ListNode类 */ function ReverseList( head ) { // write code here let pre = null , after =null while(head){ after = head.next; head.next = pre pre = hea...