新加坡总理李显龙两周前在一个创业者论坛上透露，他最后编写的一个程序是解决数独问题的程序（Sudoku solver），还是多年前用 C++ 实现的。此程序就是李显龙所编。 李显龙说：这个程序非常基础，在 DOS 窗口下运行。按行输入数据（比如：1-3-8—6），程序会打印出解决方案（如果有多种方案，则输出所有的）、程序所用的步数，还有一些搜索数据。该程序做了回溯搜索，选择下一个扇出（fanout）最小的单元格。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001324s ]
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:0.090132s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001492s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002078s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001363s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003678s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001141s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003233s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015189s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001449s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 89425 [ RunTime:0.001267s ]
