#include <stdio.h>
#include <stdlib.h>

int main()
{
    int num, i, y;

    printf("Enter a number for generating the pyramid:\n");
    scanf("%d", &num);

    for (y = 0; y <= num; y++)
    {
        for (i = 0; i < num - y; i++)
        {
            printf("   ");
        }

        for (i = -y; i <= y; i++)
        {
            printf("%3d", abs(i));
        }

        printf("\n");
    }

    return 0;
}