骑士漫游的改进算法，回溯算法加贪心选择策略，n最大可以到128-Knight improved roaming algorithms, backtracking algorithms greedy selection strategy increases, n the greatest can go to 128
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.003233s ]
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:0.095732s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002583s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001937s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002195s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003676s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001683s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003355s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014576s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002435s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 316147 [ RunTime:0.001229s ]
