Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ACM-ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

No tag edit access

D. Labelling Cities

time limit per test

3 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputOleg the bank client lives in Bankopolia. There are *n* cities in Bankopolia and some pair of cities are connected directly by bi-directional roads. The cities are numbered from 1 to *n*. There are a total of *m* roads in Bankopolia, the *i*-th road connects cities *u*_{i} and *v*_{i}. It is guaranteed that from each city it is possible to travel to any other city using some of the roads.

Oleg wants to give a label to each city. Suppose the label of city *i* is equal to *x*_{i}. Then, it must hold that for all pairs of cities (*u*, *v*) the condition |*x*_{u} - *x*_{v}| ≤ 1 holds if and only if there is a road connecting *u* and *v*.

Oleg wonders if such a labeling is possible. Find an example of such labeling if the task is possible and state that it is impossible otherwise.

Input

The first line of input contains two space-separated integers *n* and *m* (2 ≤ *n* ≤ 3·10^{5}, 1 ≤ *m* ≤ 3·10^{5}) — the number of cities and the number of roads.

Next, *m* lines follow. The *i*-th line contains two space-separated integers *u*_{i} and *v*_{i} (1 ≤ *u*_{i}, *v*_{i} ≤ *n*, *u*_{i} ≠ *v*_{i}) — the cities connected by the *i*-th road. It is guaranteed that there is at most one road between each pair of cities and it is possible to travel from any city to any other city using some roads.

Output

If the required labeling is not possible, output a single line containing the string "NO" (without quotes).

Otherwise, output the string "YES" (without quotes) on the first line. On the next line, output *n* space-separated integers, *x*_{1}, *x*_{2}, ..., *x*_{n}. The condition 1 ≤ *x*_{i} ≤ 10^{9} must hold for all *i*, and for all pairs of cities (*u*, *v*) the condition |*x*_{u} - *x*_{v}| ≤ 1 must hold if and only if there is a road connecting *u* and *v*.

Examples

Input

4 4

1 2

1 3

1 4

3 4

Output

YES

2 3 1 1

Input

5 10

1 2

1 3

1 4

1 5

2 3

2 4

2 5

3 4

3 5

5 4

Output

YES

1 1 1 1 1

Input

4 3

1 2

1 3

1 4

Output

NO

Note

For the first sample, *x*_{1} = 2, *x*_{2} = 3, *x*_{3} = *x*_{4} = 1 is a valid labeling. Indeed, (3, 4), (1, 2), (1, 3), (1, 4) are the only pairs of cities with difference of labels not greater than 1, and these are precisely the roads of Bankopolia.

For the second sample, all pairs of cities have difference of labels not greater than 1 and all pairs of cities have a road connecting them.

For the last sample, it is impossible to construct a labeling satisfying the given constraints.

Codeforces (c) Copyright 2010-2017 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Nov/21/2017 02:03:17 (c6).

Desktop version, switch to mobile version.

User lists

Name |
---|