mindtree pattern programs

#include<stdio.h>
int main()
{
    int i,j,n,count=0,k=0;
scanf("%d",&n);
for(i=1;i<=n;i++)
{
count=k;
for(j=1;j<=i;j++)
{
if(i%2==0)
{
printf("%d",count+i);
count=count-1;
if(j!=i)printf("*");
k++;
}
else
{
count=count+1;
printf("%d",count);
if(j!=i)printf("*");
k++;
}
}
printf("\n");
}
return 0;
}

input: 5
output:
1
3*2
4*5*6
10*9*8*7
11*12*13*14*15