/* struct ListNode { int val; struct ListNode *next; ListNode(int x) : val(x), next(NULL) { } };*/ class Solution { public: ListNode* Merge(ListNode* pHead1, ListNode* pHead2) { if(pHead1 == NULL) return pHead2; if(pHead2 == NULL) return pHead1; ListNode *p1,*p2,*tail; p1 = pHead1; p2 = pHead2; //将p...