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Time Limit: 1 s Memory Limit: 512 MB Total points: 100

#7478. 无力回天 NOI2017

Statistics

你需要维护编号为 $1,\dots,m$ 的 $m$ 个集合,初始为空。

共 $m$ 次操作:

  1. 给定 $x,y$,在编号 $x$ 的集合插入 $y$,保证 $y$ 之前不在这个集合中;
  2. 给定 $x_1,x_2$,问编号 $x_1,x_2$ 的集合的并的元素个数。

输入格式

第一行一个整数 $m$;

接下来 $m$ 行,每行三个整数 $1,x,y$ 或 $2,x_1,x_2$ 表示一次操作。

输出格式

对每个 $2$ 操作,输出一行,表示答案。

样例数据

样例输入

10
1 1 2
1 1 1
2 1 3
1 1 3
1 1 8
2 2 1
2 2 1
2 1 1
1 1 4
1 2 2

样例输出

2
4
4
4

提示

Idea:nzhtl1477,Solution:nzhtl1477,Code:ccz181078,Data:ccz181078

对于 $100\%$ 的数据,满足 $1\le m\le 10^6$,$1\le x,y,x_1,x_2\le m$;

对于 $25\%$ 的数据,满足 $m\le10^3$。

对于另外 $25\%$ 的数据,保证在第一次 $2$ 操作后,没有 $1$ 操作。

对于另外 $25\%$ 的数据,满足 $m\le 2\times 10^5$。

对于另外 $25\%$ 的数据,无特殊限制。

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