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

int main()
{
    int n, i, j;
    printf("How many rows you want to show?: ");
    scanf("%d", &n);
    for (i=0; i<n; i++) {
        int c = 1;
        for(j=0; j<n-i-1; j++) printf("   ");

        for(j=i; j>=0; j--) {
            printf("%d     ", c);
            c = c * j/(i-j+1);
        }
        printf("\n");
    }
}