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127

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$$\int_{i(M)}\mathrm{d} \omega =\int_{\partial M}\omega$$

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Accepted problems：3 problems

899 21731 21769

Tried problems：5 problems

1357 21726 21729 21730 21770

Authored problems：4 problems

#	Problem Name
1	Not Another Linear Algebra Problem
2	沙堆
3	枪打出头鸟
4	伟大 NIT 的贸易计划

Virtual Participations：0 contest

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