C++ 先排序在逐个合并 * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val(x), next(NULL) {} * }; */ class Solution { public: ListNode *mergeKLists(vector<ListNode *> &lists) { sort(lists.begin(),lists.end(),[](const ListNode * A,const ListN...