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    有问题题目反馈贴

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    本题 BZOJ 原题号 4500

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    好题

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    UB?

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    修复题面

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    题面或数据有误

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    修复题面

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    题目修缮

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    修复题面

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    请求开大时限

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    修复题面

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    中文题面

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    请求 SPJ

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    修复题面

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    n的范围1e5

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    修复题面

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    修复题面

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    题面有误

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    本题缺失 spj

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    bzoj5000+的洛谷题号

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