#include <stdio.h>
 
int main() {
    int a[10][10];
    int *p;
    int rows, cols, i, j, temp;
 
    printf("Enter number of rows and columns: ");
    scanf("%d %d", &rows, &cols);
 
    printf("Enter elements of the matrix:\n");
    for (i = 0; i < rows; i++) {
        for (j = 0; j < cols; j++) {
            scanf("%d", &a[i][j]);
        }
    }
 
    p = &a[0][0];  // Pointer to the first element of the matrix
 
    printf("\nOriginal Matrix:\n");
    for (i = 0; i < rows; i++) {
        for (j = 0; j < cols; j++) {
            printf("%d ", *(p + i * cols + j));
        }
        printf("\n");
    }
 
    // Interchange first and last row using pointers
    for (j = 0; j < cols; j++) {
        temp = *(p + 0 * cols + j);
        *(p + 0 * cols + j) = *(p + (rows - 1) * cols + j);
        *(p + (rows - 1) * cols + j) = temp;
    }
 
    // Interchange first and last column using pointers
    for (i = 0; i < rows; i++) {
        temp = *(p + i * cols + 0);
        *(p + i * cols + 0) = *(p + i * cols + (cols - 1));
        *(p + i * cols + (cols - 1)) = temp;
    }
 
    printf("\nMatrix after Interchanging First and Last Row, and First and Last Column:\n");
    for (i = 0; i < rows; i++) {
        for (j = 0; j < cols; j++) {
            printf("%d ", *(p + i * cols + j));
        }
        printf("\n");
    }
 
    return 0;
}