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这题真的要特别注意细节首先，裸的线段树TLE，需要lazy优化 其次，当确定自己的算法没问题的时候，注意数据类型，所有需要把int赋给long long的地方都要注意一下，包括读初始数据的时候 改来改去几乎把每个地方都测试过了 Followed by: Post your reply here: |
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