/* struct ListNode { int val; struct ListNode *next; ListNode(int x) : val(x), next(NULL) { } };*/ #include <unistd.h> class Solution { public: ListNode* FindFirstCommonNode( ListNode* pHead1, ListNode* pHead2) { //当两链表有一个为空时返回空 if(pHead1==nullptr||pHead2==nullptr){ return n...