#include <stdio.h>
 
int main() {
    int a[10][10], b[10][10], result[10][10];
    int *p, *q, *r;
    int i, j, k, rows1, cols1, rows2, cols2;
 
    printf("Enter rows and columns of first matrix: ");
    scanf("%d %d", &rows1, &cols1);
 
    printf("Enter rows and columns of second matrix: ");
    scanf("%d %d", &rows2, &cols2);
 
    // Check if multiplication is possible
    if (cols1 != rows2) {
        printf("Matrix multiplication not possible!\n");
        return 0;
    }
 
    // Input elements for first matrix
    printf("Enter elements of first matrix:\n");
    for (i = 0; i < rows1; i++) {
        for (j = 0; j < cols1; j++) {
            scanf("%d", &a[i][j]);
        }
    }
 
    // Input elements for second matrix
    printf("Enter elements of second matrix:\n");
    for (i = 0; i < rows2; i++) {
        for (j = 0; j < cols2; j++) {
            scanf("%d", &b[i][j]);
        }
    }
 
    // Initialize pointers
    p = &a[0][0];
    q = &b[0][0];
    r = &result[0][0];
 
    // Initialize result matrix to zero
    for (i = 0; i < rows1 * cols2; i++) {
        *(r + i) = 0;
    }
 
    // Matrix multiplication using pointers
    for (i = 0; i < rows1; i++) {
        for (j = 0; j < cols2; j++) {
            for (k = 0; k < cols1; k++) {
                *(r + i * cols2 + j) += (*(p + i * cols1 + k)) * (*(q + k * cols2 + j));
            }
        }
    }
 
    // Display result
    printf("\nResultant Matrix (Product):\n");
    for (i = 0; i < rows1; i++) {
        for (j = 0; j < cols2; j++) {
            printf("%d ", result[i][j]);
        }
        printf("\n");
    }
 
    return 0;
}