loongson2f

Merge pull request zhblue#387 from jizhuozhi/master

Multiplatform backup and restore

Update problemset.php

bigger result

https://github.com/zhblue/hustoj/issues/378

Update cn.php

php7

Merge pull request zhblue#345 from jizhuozhi/master

Update trunk/install/install-centos7.sh

Merge pull request zhblue#333 from jizhuozhi/master

Update trunk/install/install-centos7.sh
Thank you!

Update problem_judge.php