马周游问题
８＊８棋盘中，一个马从某一位置是否能恰好访问每个格一次再回到起点？-Ma Traveled 8* 8 chessboard. a horse from a particular position can just visit each lattice back to the starting point once again?
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002653s ]
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:0.117093s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002862s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002446s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004000s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002770s ]
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SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015779s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002763s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 153697 [ RunTime:0.001238s ]
