Problem:
Score : 700 points

Problem Statement

You are given four integers: H, W, h and w (1 ≤ h ≤ H, 1 ≤ w ≤ W).
Determine whether there exists a matrix such that all of the following conditions are held, and construct one such matrix if the answer is positive:

The matrix has H rows and W columns.

Each element of the matrix is an integer between -10^9 and 10^9 (inclusive).

The sum of all the elements of the matrix is positive.

The sum of all the elements within every subrectangle with h rows and w columns in the matrix is negative.

Constraints

1 ≤ h ≤ H ≤ 500

1 ≤ w ≤ W ≤ 500

Input

Input is given from Standard Input in the following format:

H W h w

Output

If there does not exist a matrix that satisfies all of the conditions, print No.

Otherwise, print Yes in the first line, and print a matrix in the subsequent lines in the following format:

a_{11} ... a_{1W}
:
a_{H1} ... a_{HW}

Here, a_{ij} represents the (i,\ j) element of the matrix.

Sample Input 1

3 3 2 2

Sample Output 1

Yes
1 1 1
1 -4 1
1 1 1

The sum of all the elements of this matrix is 4, which is positive.
Also, in this matrix, there are four subrectangles with 2 rows and 2 columns as shown below. For each of them, the sum of all the elements inside is -1, which is negative.

Sample Input 2

2 4 1 2

Sample Output 2

No

Sample Input 3

3 4 2 3

Sample Output 3

Yes
2 -5 8 7
3 -5 -4 -5
2 1 -1 7

Solution in Ruby (2.3.3) (judge verdict: Accepted)

H,W,h,w = gets.split.map(&:to_i)
ans = Array.new((H+3*h-1)/h*h).map{Array.new((W+3*w-1)/w*w,0)}
for i in 0..(H+h-1)/h
    for j in 0..(W+w-1)/w
        ans[i*h][j*w] = -10**9
        ans[i*h+1][j*w+1] = 10**9-1
    end
end
sum = 0
for i in 1..H
    sum += ans[i][1..W].inject(:+)
end
if sum > 0
    puts "Yes"
    for i in 1..H
        puts ans[i][1..W].join(" ")
    end
else
    puts "No"
end