Score : $600$ points

问题描述

Takahashi 拥有 $10^{100}$ 张每种类型的卡片，共有 $N$ 种类型。最初，第 $i$ 种类型的卡片的得分和限额分别设置为 $a_i$ 和 $b_i$。

接下来将按照以下格式接收并处理 $Q$ 个查询请求：

• 1 x y: 将第 $x$ 种类型的卡片得分设置为 $y$。
• 2 x y: 将第 $x$ 种类型的卡片限额设置为 $y$。
• 3 x: 如果在满足以下条件下可以选择 $x$ 张卡片，则输出所选卡片得分的最大可能总和；否则输出 -1。
  • 每种类型的卡片选择数量不超过其限额。

以上为通义千问 qwen-max 翻译，仅供参考。

Problem Statement

Takahashi has $10^{100}$ cards of each of $N$ kinds. Initially, the score and quota of the $i$-th kind of card are set to $a_i$ and $b_i$, respectively.

Given $Q$ queries in the following formats, process them in order.

• 1 x y: set the score of the $x$-th kind of card to $y$.
• 2 x y: set the quota of the $x$-th kind of card to $y$.
• 3 x: if one can choose $x$ cards subject to the following condition, print the maximum possible sum of the scores of the chosen cards; print -1 otherwise.
  • The number of chosen cards of each kind does not exceed its quota.

Constraints

• $1 \leq N,Q \leq 2 \times 10^5$
• $0 \leq a_i \leq 10^9$
• $0 \leq b_i \leq 10^4$
• For each query of the $1$-st kind, $1 \leq x \leq N$ and $0 \leq y \leq 10^9$.
• For each query of the $2$-nd kind, $1 \leq x \leq N$ and $0 \leq y \leq 10^4$.
• For each query of the $3$-rd kind, $1 \leq x \leq 10^9$.
• There is at least one query of the $3$-rd kind.
• All values in the input are integers.

Input

The input is given from Standard Input in the following format, where $\mathrm{query}_i$ denotes the $i$-th query:

$N$

$a_1$ $b_1$

$\vdots$

$a_N$ $b_N$

$Q$

$\mathrm{query}_1$

$\vdots$

$\mathrm{query}_Q$

Output

Print $M$ lines, where $M$ is the number of queries of the $3$-rd kind.
The $i$-th line should contain the response to the $i$-th such query.

Sample Input 1

3
1 1
2 2
3 3
7
3 4
1 1 10
3 4
2 1 0
2 3 0
3 4
3 2

Sample Output 1

11
19
-1
4

For the first query of the $3$-rd kind, you can choose one card of the $2$-nd kind and three cards of the $3$-rd kind for a total score of $11$, which is the maximum.
For the second such query, you can choose one card of the $1$-st kind and three cards of the $3$-rd kind for a total score of $19$, which is the maximum.
For the third such query, you cannot choose four cards, so -1 should be printed.
For the fourth such query, you can choose two cards of the $2$-nd kind for a total score of $4$, which is the maximum.

update @ 2024/3/10 12:00:48