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 Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)

import java.util.*;
 
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int H = sc.nextInt();
		int W = sc.nextInt();
		int h = sc.nextInt();
		int w = sc.nextInt();
		
		long x = (-1)*h*w;
		String[] ans = new String[H];
		for(int i=0; i<H; ++i){
			ans[i] = "";
		}
		
		long sum = 0;
		for(int i=1; i<=H; ++i){
			StringBuilder sb = new StringBuilder();
			for(int j=1; j<=W; j++){
				if(i%h==0 &&j%w==0){
					sb.append(x);
					sb.append(" ");
					sum+=x;
				}else{
					sb.append(1);
					sb.append(" ");
					sum++;
				}
			}
			sb.deleteCharAt(sb.length()-1);	
			ans[i-1] = sb.toString();
		}
		
		if(sum<=0) System.out.println("No");
		else{
			System.out.println("Yes");
			for(int i=0; i<H; i++){
				System.out.println(ans[i]);
			}
		}
		return;
	}
}