/* struct ListNode { int val; struct ListNode *next; ListNode(int x) : val(x), next(NULL) { } };*/ class Solution { public: ListNode* ReverseList(ListNode* pHead) { ListNode* _cur = pHead; ListNode* _pre = nullptr; ListNode* _tmp = nullptr; while (_cur != nullptr) { _tmp = _cur->next; _cur->ne...