"""输入一串字符,检查是否可以组成friend""" from collections import Counter def foo(num_list): for i in friend: try: num = count[i] if num < num_list[0]: num_list.pop() num_list.append(num) except KeyError as e: print('输入的字符串不能组成friend...
--把查询的结果组织为一串字符(板板鞋,兵乓球,篮球,足球) drop table a create table a( name varchar(20)) insert into a select '足球' union select '篮球' union select '兵乓球' union select '板板鞋' go DECLARE @combinedString VARCHAR(MAX) SELECT @combinedString = COALESCE(@combinedString
错误: remote: HTTP Basic: Access denied remote: You must use a personal access token with ‘api’ scope for Git over HTTP. remote: You can generate one at https://github.com/profile/personal_access_tokens 错误原因: You must use a personal access token with ‘
1.原题: https://leetcode.com/problems/defanging-an-ip-address/ 这道题本身很简单, Given a valid (IPv4) IP address, return a defanged version of that IP address. A defanged IP address replaces every period "." with "[.]". 翻译就是,给出一个ipv4地址,把这个地址中的“.