Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only 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

В условии задачи недавно были сделаны правки. Просмотреть изменения.

×
E. Soldier and Traveling

time limit per test

1 secondmemory limit per test

256 megabytesinput

standard inputoutput

standard outputIn the country there are *n* cities and *m* bidirectional roads between them. Each city has an army. Army of the *i*-th city consists of *a*_{i} soldiers. Now soldiers roam. After roaming each soldier has to either stay in his city or to go to the one of neighboring cities by at moving along at most one road.

Check if is it possible that after roaming there will be exactly *b*_{i} soldiers in the *i*-th city.

Input

First line of input consists of two integers *n* and *m* (1 ≤ *n* ≤ 100, 0 ≤ *m* ≤ 200).

Next line contains *n* integers *a*_{1}, *a*_{2}, ..., *a*_{n} (0 ≤ *a*_{i} ≤ 100).

Next line contains *n* integers *b*_{1}, *b*_{2}, ..., *b*_{n} (0 ≤ *b*_{i} ≤ 100).

Then *m* lines follow, each of them consists of two integers *p* and *q* (1 ≤ *p*, *q* ≤ *n*, *p* ≠ *q*) denoting that there is an undirected road between cities *p* and *q*.

It is guaranteed that there is at most one road between each pair of cities.

Output

If the conditions can not be met output single word "NO".

Otherwise output word "YES" and then *n* lines, each of them consisting of *n* integers. Number in the *i*-th line in the *j*-th column should denote how many soldiers should road from city *i* to city *j* (if *i* ≠ *j*) or how many soldiers should stay in city *i* (if *i* = *j*).

If there are several possible answers you may output any of them.

Examples

Input

4 4

1 2 6 3

3 5 3 1

1 2

2 3

3 4

4 2

Output

YES

1 0 0 0

2 0 0 0

0 5 1 0

0 0 2 1

Input

2 0

1 2

2 1

Output

NO

Codeforces (c) Copyright 2010-2020 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Sep/24/2020 04:53:12 (f1).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|