/* struct ListNode { int val; struct ListNode *next; ListNode(int x) : val(x), next(NULL) { } };*/ class Solution { public: ListNode* FindFirstCommonNode( ListNode* pHead1, ListNode* pHead2) { ListNode* one = pHead1; ListNode* two = pHead2; while(one!=nullptr) { while(two!=nullptr) { if(one == two) ...