子集和问题.rar:这是我学算法设计时的总结,包括定长和不定长做法(也就是回朔法,剪枝限界),当然也包括穷举法.-subset and problems. Rar : This is my learning algorithm design at the conclusion, including fixed-length and variable length approach (that is, back to Schomburg, pruning Bound), which of course includes exhaustive law.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001014s ]
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:0.063458s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001325s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001413s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001004s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003372s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000841s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003719s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017295s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001400s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 110747 [ RunTime:0.018343s ]