递归反转单链表(头插法反转部分链表 要弄pre cur 还有nxt(临时变量保存下一个结点 P0指到需要修改的链表的前一个结点 class Solution {public ListNode reverseBetween(ListNode head, int left, int right) {ListNode dummy=new ListNode(-1,head);ListNode p0=
pod install的时候出现 The version of CocoaPods used to generate the lockfile (1.2.1) is higher than the version of the current executable (1.1.1). Incompatibility issues may arise. 解决: pod