CF1620E.Replace the Numbers

普及/提高-

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题目描述

You have an array of integers (initially empty).

You have to perform $q$ queries. Each query is of one of two types:

" $1$ $x$ " — add the element $x$ to the end of the array;
" $2$ $x$ $y$ " — replace all occurrences of $x$ in the array with $y$ .

Find the resulting array after performing all the queries.

输入格式

The first line contains a single integer $q$ ( $1 \le q \le 5 \cdot 10^5$ ) — the number of queries.

Next $q$ lines contain queries (one per line). Each query is of one of two types:

" $1$ $x$ " ( $1 \le x \le 5 \cdot 10^5$ );
" $2$ $x$ $y$ " ( $1 \le x, y \le 5 \cdot 10^5$ ).

It's guaranteed that there is at least one query of the first type.

输出格式

In a single line, print $k$ integers — the resulting array after performing all the queries, where $k$ is the number of queries of the first type.

输入输出样例

输入#1

输出#1

3 2 2 3 2

输入#2
```
4
1 1
1 2
1 1
2 2 2
```
输出#2
```
1 2 1
```

输入#3

输出#3

1 3 3 7

说明/提示

In the first example, the array changes as follows:

$[]$ $\rightarrow$ $[3]$ $\rightarrow$ $[3, 1]$ $\rightarrow$ $[3, 2]$ $\rightarrow$ $[3, 2, 2]$ $\rightarrow$ $[3, 2, 2, 1]$ $\rightarrow$ $[3, 2, 2, 1, 2]$ $\rightarrow$ $[3, 2, 2, 3, 2]$ .

In the second example, the array changes as follows:

$[]$ $\rightarrow$ $[1]$ $\rightarrow$ $[1, 2]$ $\rightarrow$ $[1, 2, 1]$ $\rightarrow$ $[1, 2, 1]$ .

In the third example, the array changes as follows:

$[]$ $\rightarrow$ $[]$ $\rightarrow$ $[1]$ $\rightarrow$ $[1, 4]$ $\rightarrow$ $[1, 4, 2]$ $\rightarrow$ $[1, 4, 4]$ $\rightarrow$ $[1, 3, 3]$ $\rightarrow$ $[1, 3, 3, 2]$ $\rightarrow$ $[1, 3, 3, 7]$ .

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