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:0.001907s ]
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:0.140259s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001835s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002915s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001917s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004816s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001560s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005024s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.023433s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002136s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 91395 [ RunTime:0.001734s ]
