hdu 1541 Stars（线段树单点更新，区间查询）

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hdu 2795 Billboard 线段树单点更新

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NYOJ-568/1012//UVA-12299RMQ with Shifts，线段树单点更新+区间查询

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hihoCoder week19 RMQ问题再临-线段树单点更新区间查询

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hdu 5480 Conturbatio 线段树单点更新，区间查询最小值

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