Pattern Problem 10

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

    return 0;
}