Problem B
Fakebool Quick-Find

The social network Fakebool has had a lot of problems with fake news spread by fake user accounts. You have been hired along with a team of consultants to shut them down.

By using a 100% fail-proof machine learning technique, a colleague has managed to identify pairs of profiles on the network which definitely are managed by the same individual. You are interested in quickly determining what is the original user account of the person behind a username. You define the oldest account created by a person to be his original account; each account is associated with a unique identifier (ID) from $0$ to $n-1$ where a smaller number indicate an older account.

This all reminds you of a course you once took in algorithms and data structures, and something called Union Find. In particular, there was an implementation you vividly recall named quick-find which answered such questions in constant time! You decide to implement it, and test it with your colleague’s data.

Input

The first line of input consists of two integers $n$, the number of user accounts at Fakebool, and $m$, the size of the data set produced by your colleague. Then follows $m$ lines, the $i$’th of which containing two integers $a_i$ and $b_i$ representing two ID’s belonging to the same individual.

Constraints

• $1\le n\le 2000$

• $1\le m\le 2000$

Output

Output a single line with $n$ space-separated integers $p_0,p_1,\dots ,p_{n-1}$, where $p_i$ should be the ID of the original user account of the person managing account $i$. Amazingly, this output is also the exact content of the id array in your quick-find implementation, since you decided that your union operation will always retain the lower number.

6 3
3 1
4 5
0 5

0 1 2 1 0 0