#include<stdio.h>
#include<conio.h>
main()
{
int n,r=1,val,j;
clrscr();
printf("enter the number of rows in the pyramid\t");
scanf("%d",&n);
while(r<=n)
{
val=r;
for(j=1;j<=n-r;j++)
printf("\t");
for(j=1;j<=2*r-1;j++)
if(j<=(2*r-1)/2)
printf("%d\t",val++);
else if(j==(2*r-1)/2+1)
printf("%d\t",val);
else
printf("%d\t",--val);
printf("\n");
r++;
}
getch();
}