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终于AC了总想省着点用__int64, 于是把 (10*n+t)/11 处理成 static_cast<int>(10*(n/11.0f)+(t/11.0f)+0.5f) 虽然官方的测试数据都过了，却老是WA. 改成 (10*(__int64)(n)+t)/11就AC了. Followed by:
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