qq_38095787的博客

138. 复制带随机指针的链表"""# Definition for a Node.class Node: def __init__(self, x: int, next: 'Node' = None, random: 'Node' = None): self.val = int(x) self.next = next self.random = random"""class Solution: # cached_node = {

class Solution: def reverseList(self, head: ListNode) -> ListNode: pre = None cur = head while cur: tmp = cur.next cur.next = pre pre = cur cur = tm.

class Solution { public int[] spiralOrder(int[][] matrix) { if(matrix==null||matrix.length==0||matrix[0].length==0){ return new int[0]; } int rows = matrix.length; int colums = matrix[0].length; Bool.