给定n 个整数a ,a , ,an 1 2 组成的序列, a n i | |£ ,1 £ i £ n。如果对于i £ j ,有
0 = å
=
j
k i
k a ,则称序列区间i i j a , a , , a +1 为一个零和区间,相应的区间长度为j-i+1。-given n integers a, a, and an 1 2
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002805s ]
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:0.146558s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002936s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003399s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002799s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.006454s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002510s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006355s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.024769s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.003148s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 190395 [ RunTime:0.001391s ]