import java.util.Scanner;
public class Matrix {
  public static void main (String[] args){
    Scanner sc = new Scanner(System.in);
    System.out.println("Enter the number of rows for the 1st matrix (Matrix A): ");
    int s = sc.nextInt();
    System.out.println("Enter the number of columns for the 1st matrix (Matrix A): ");
    int t = sc.nextInt();
    System.out.println("Enter the number of rows for the 1st matrix (Matrix B): ");
    int o = sc.nextInt();
    System.out.println("Enter the number of columns for the 1st matrix (Matrix B): ");
    int p = sc.nextInt();
    int[][] a = new int[s][t];
    int[][] b = new int[o][p];
    for (x=0; x< a.length; x++){
      for (y=0; y<a[0].length; y++){
      System.out.println("Enter a["+x+"]["+y+"]: ");
      a[x][y] = sc.nextInt();
      }
    }
    for (c=0; c< b.length; c++){
      for (d=0; d<b[0].length; d++){
      System.out.println("Enter b["+c+"]["+d+"]: ");
      b[x][y] = sc.nextInt();
      }
    }
  public static int[][] matrixAdd(int[][] a, int[][] b) {
    if (a.length == 0 || b.length == 0) {
        return new int[0][0];
    }
    else {
        int[][] sum = new int[a.length][a[0].length];

        for (int i = 0; i < result.length; i++) {

            for (int j = 0; j < result[0].length; j++) {
                result[i][j] = a[i][j] + b[i][j];
            }

        }

        return result;
    }
}
  public static int[][] matrixSub(int[][] a, int[][] b) {
    if (a.length == 0 || b.length == 0) {
        return new int[0][0];
    }
    else {
        int[][] sub = new int[a.length][a[0].length];

        for (int i = 0; i < result.length; i++) {

            for (int j = 0; j < result[0].length; j++) {
                result[i][j] = a[i][j] - b[i][j];
            }

        }

        return result;
    }
}
  public static int[][] matrixSub(int[][] a, int[][] b) {
    if (a.length == 0 || b.length == 0) {
        return new int[0][0];
    }
    else {
        int[][] sub = new int[a.length][a[0].length];

        for (int i = 0; i < result.length; i++) {

            for (int j = 0; j < result[0].length; j++) {
                result[i][j] = a[i][j] - b[i][j];
            }

        }

        return result;
    }
}
}

    Scanner sc = new Scanner(System.in);
    System.out.println()