Merge branch 'new-arch' of https://git.coding.net/virusdefender/qduoj into new-arch
* 'new-arch' of https://git.coding.net/virusdefender/qduoj: 修复部分小问题 Squash fromb973dfdto12f96c6by virusdefender
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* 'new-arch' of https://git.coding.net/virusdefender/qduoj: 修复部分小问题 Squash fromb973dfdto12f96c6by virusdefender