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$n\le 10^5,m\le 2\times 10^5$

$n\le 10^5,a_i\le 10^6$

提高组

T1

$n,m\le 10^5$

Dynamic Rankings来引入该算法（BZOJ 1901，但是个权限题）

1. 查询区间k-th
2. 单点修改

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