经典矩形问题 生成各种矩阵是竞赛时经常考的一种题目,如何用C语言或C++生成以下形式几种矩阵:-classic rectangular matrix of various problems generated when the contest is a regular test subject, how to use C or C generated several matrix form :
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001158s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.072645s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001174s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001124s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001039s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003023s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000926s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003561s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014934s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001180s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 91395 [ RunTime:0.013273s ]
