# SkyWT

#### 我们的征途是星辰大海

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✨ 最近更新：添加全站 PJAX 无刷新（220930）。

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Educational Codeforces Round 71 (Rated for Div. 2)

# F - Remainder Problem

## Description

*2100

• 1 x y：将 $a_x$ 增加 $y$；
• 2 x y：计算 $\sum\limits_{i \in R(x, y)} a_i$，其中 $R(x,y)$ 表示 1 到 500000 中模 $x$ 余 $y$ 的数字集合。

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2019.11.07 Upd：其实不是真的完结了，有些题目实在搞不动 QwQ

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# D - Power Products

## Description

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Codeforces Round #578 (Div. 2)

# D - White Lines

## Description

*1900

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Codeforces Round #581 (Div. 2) 比赛链接：LInk

# C - Anna, Svyatoslav and Maps

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## Description

Yaroslav has n points that lie on the $Ox$ axis. The coordinate of the first point is $x_1$, the coordinate of the second point is $x_2$, ..., the coordinate of the n-th point is — $x_n$. Now Yaroslav wants to execute $m$ queries, each of them is of one of the two following types: