这是计算机算法中的回溯法中的一个经典的问题--N皇后问题!希望对学计算机算法的同学有用!-This is a computer algorithm, the retroactive law on the issue of a classic-- N Queen! Want to learn how to use computer algorithms useful to the students!
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000986s ]
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:0.087069s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000970s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000902s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003031s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000846s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003704s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.035504s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002588s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 121441 [ RunTime:0.036579s ]