Codeforces Round 478 (Div. 2)
E
Hag's Khashba
Codeforces
2600
原题
← D→
翻译中…

Hag is a very talented person. He has always had an artist inside him but his father forced him to study mechanical engineering.

翻译中…

Yesterday he spent all of his time cutting a giant piece of wood trying to make it look like a goose. Anyway, his dad found out that he was doing arts rather than studying mechanics and other boring subjects. He confronted Hag with the fact that he is a spoiled son that does not care about his future, and if he continues to do arts he will cut his 25 Lira monthly allowance.

翻译中…

Hag is trying to prove to his dad that the wooden piece is a project for mechanics subject. He also told his dad that the wooden piece is a strictly convex polygon with $n$ vertices.

翻译中…

Hag brought two pins and pinned the polygon with them in the $1$-st and $2$-nd vertices to the wall. His dad has $q$ queries to Hag of two types.

翻译中…
  • $1$ $f$ $t$: pull a pin from the vertex $f$, wait for the wooden polygon to rotate under the gravity force (if it will rotate) and stabilize. And then put the pin in vertex $t$.
  • $2$ $v$: answer what are the coordinates of the vertex $v$.
翻译中…

Please help Hag to answer his father's queries.

翻译中…

You can assume that the wood that forms the polygon has uniform density and the polygon has a positive thickness, same in all points. After every query of the 1-st type Hag's dad tries to move the polygon a bit and watches it stabilize again.

翻译中…

Input

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The first line contains two integers $n$ and $q$ ($3\leq n \leq 10\,000$, $1 \leq q \leq 200000$) — the number of vertices in the polygon and the number of queries.

翻译中…

The next $n$ lines describe the wooden polygon, the $i$-th line contains two integers $x_i$ and $y_i$ ($|x_i|, |y_i|\leq 10^8$) — the coordinates of the $i$-th vertex of the polygon. It is guaranteed that polygon is strictly convex and the vertices are given in the counter-clockwise order and all vertices are distinct.

翻译中…

The next $q$ lines describe the queries, one per line. Each query starts with its type $1$ or $2$. Each query of the first type continues with two integers $f$ and $t$ ($1 \le f, t \le n$) — the vertex the pin is taken from, and the vertex the pin is put to and the polygon finishes rotating. It is guaranteed that the vertex $f$ contains a pin. Each query of the second type continues with a single integer $v$ ($1 \le v \le n$) — the vertex the coordinates of which Hag should tell his father.

翻译中…

It is guaranteed that there is at least one query of the second type.

翻译中…

Output

翻译中…

The output should contain the answer to each query of second type — two numbers in a separate line. Your answer is considered correct, if its absolute or relative error does not exceed $10^{-4}$.

翻译中…

Formally, let your answer be $a$, and the jury's answer be $b$. Your answer is considered correct if $\frac{|a - b|}{\max{(1, |b|)}} \le 10^{-4}$

翻译中…

Note

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In the first test note the initial and the final state of the wooden polygon.

翻译中…

image

翻译中…

Red Triangle is the initial state and the green one is the triangle after rotation around $(2,0)$.

翻译中…

In the second sample note that the polygon rotates $180$ degrees counter-clockwise or clockwise direction (it does not matter), because Hag's father makes sure that the polygon is stable and his son does not trick him.

翻译中…

样例

Input #1
3 4
0 0
2 0
2 2
1 1 2
2 1
2 2
2 3
Output #1
3.4142135624 -1.4142135624
2.0000000000 0.0000000000
0.5857864376 -1.4142135624
InputCopy OutputCopy
Input #2
3 2
-1 1
0 0
1 1
1 1 2
2 1
Output #2
1.0000000000 -1.0000000000
InputCopy OutputCopy
题目信息
题号
975E
时间限制
3 s
内存限制
256 MB
标签
计算几何

题面与样例版权归 Codeforces 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。