306540: CF1211I. Unusual Graph

Ivan on his birthday was presented with array of non-negative integers $a_1, a_2, \ldots, a_n$. He immediately noted that all $a_i$ satisfy the condition $0 \leq a_i \leq 15$.

Ivan likes graph theory very much, so he decided to transform his sequence to the graph.

There will be $n$ vertices in his graph, and vertices $u$ and $v$ will present in the graph if and only if binary notations of integers $a_u$ and $a_v$ are differ in exactly one bit (in other words, $a_u \oplus a_v = 2^k$ for some integer $k \geq 0$. Where $\oplus$ is Bitwise XOR).

A terrible thing happened in a couple of days, Ivan forgot his sequence $a$, and all that he remembers is constructed graph!

Can you help him, and find any sequence $a_1, a_2, \ldots, a_n$, such that graph constructed by the same rules that Ivan used will be the same as his graph?

The first line of input contain two integers $n,m$ ($1 \leq n \leq 500, 0 \leq m \leq \frac{n(n-1)}{2}$): number of vertices and edges in Ivan's graph.

Next $m$ lines contain the description of edges: $i$-th line contain two integers $u_i, v_i$ ($1 \leq u_i, v_i \leq n; u_i \neq v_i$), describing undirected edge connecting vertices $u_i$ and $v_i$ in the graph.

It is guaranteed that there are no multiple edges in the graph. It is guaranteed that there exists some solution for the given graph.

Output $n$ space-separated integers, $a_1, a_2, \ldots, a_n$ ($0 \leq a_i \leq 15$).

Printed numbers should satisfy the constraints: edge between vertices $u$ and $v$ present in the graph if and only if $a_u \oplus a_v = 2^k$ for some integer $k \geq 0$.

It is guaranteed that there exists some solution for the given graph. If there are multiple possible solutions, you can output any.

4 4
1 2
2 3
3 4
4 1

0 1 0 1 

3 0

0 0 0