最大覆盖问题：给定n个整数a , a , ,an 1 2 组成的序列。如果对于i £ k £ j ，有k | j | a £ a ，则称j a 覆
盖序列区间i i j a , a , , a +1 ，相应的覆盖区间长度为j-i+1。-Maximum coverage problem: Given n integers a, a,, an 1 2
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000862s ]
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:0.067049s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001713s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001475s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001126s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003556s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000878s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004351s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017813s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001457s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 219979 [ RunTime:0.013866s ]
