/* struct ListNode { int val; struct ListNode *next; ListNode(int x) : val(x), next(NULL) { } };*/ class Solution { public: ListNode* FindFirstCommonNode( ListNode* pHead1, ListNode* pHead2) { ListNode *p1,*p2; p1=pHead1; p2=pHead2; int len1=0,len2=0; while(p1!=nullptr) ...