min_coder的博客

题目给你一个链表数组，每个链表都已经按升序排列。请你将所有链表合并到一个升序链表中，返回合并后的链表。提示：k == lists.length0 <= k <= 10^40 <= lists[i].length <= 500-10^4 <= lists[i][j] <= 10^4lists[i] 按 升序 排列lists[i].length 的总和不超过 10^4示例：输入：lists = [[1,4,5],[1,3,4],[2,6]]输出：[1