#include <stdio.h>
int main()
{
    int i, j, k, l, n;
    printf("Enter the number of rows: ");
    scanf("%d", &n);
    for (i = 0; i < n; i++) {
        for (j = (n - 1); j >= i; j--){
            printf(" ");
        }
        for (k = i; k >= 0; k--){
            printf("%d", k);
        }
        for (l = 1; l <= i; l++) {
            printf("%d", l);
        }
        printf("\n");
    }
}