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题解 | #直角三角形#

{"css":"","js":"","html":"<!DOCTYPE html>\n<html lang=\"en\">\n <head>\n <meta charset=\"UTF-8\">\n </head>...

HTML/CSS/JavaScript

2022-02-16

20 1545

题解 | #创建数组#

{"css":"","js":"","html":" <!DOCTYPE html> <html> <head> <meta charset=utf-8> </head> <body> <script typ...

HTML/CSS/JavaScript

2022-02-01

2 293

题解 | #统计每个月兔子的总数#

#include<stdio.h> int shu[37]; int main(){ int n; while(scanf("%d",&n)!=EOF){ shu[1]=1; shu[2]=1; int i; ...

C++

2022-01-29

0 173

题解 | #对过长的昵称截取处理#

#sql中char_length、concat和if函数的用法 select uid, if(char_length(nick_name)>13, concat(substr(nick_name,1,10),"..."), nick_name) as nick_...

Mysql

2022-01-26

1 277

题解 | #找出每个学校GPA最低的同学#

#查出每个学校最小的gpa select device_id, university, gpa from user_profile u where gpa=( select min(gpa) from user_profile where uni...

Mysql

2022-01-22

0 161

题解 | #二叉树的下一个结点#

/* struct TreeLinkNode { int val; struct TreeLinkNode *left; struct TreeLinkNode *right; struct TreeLinkNode *next; TreeLinkNode(i...

C++

2022-01-21

0 240

题解 | #对称的二叉树#

/* struct TreeNode { int val; struct TreeNode *left; struct TreeNode *right; TreeNode(int x) : val(x), left(NULL), right(N...

C++

2022-01-19

0 202

题解 | #修复串列了的记录#

SELECT exam_id, SUBSTRING_INDEX(SUBSTRING_INDEX(tag,',',1),',',-1) as tag, SUBSTRING_INDEX(SUBSTRING_INDEX(tag,',',2),',',-1) as difficulty, SUBSTR...

Mysql

2022-01-17

0 316

题解 | #插入记录（三）#

#sql中replace的用法:如果已经存在该数据，则删除原有的数据并插入新数据 replace into examination_info values(null,9003,'SQL','hard',90,'2021-01-01 00:00:00');

Mysql

2022-01-17

0 237

题解 | #插入记录（二）#

insert into exam_record_before_2021 (uid,exam_id,start_time,submit_time,score) select uid,exam_id,start_time,submit_time,score from exam_record where...

Mysql

2022-01-16

1 441