void shell(int items[],int count)
{
	register int i,j,gap,k;
	int x,a[5];
	a[0]=9;a[1]=5;a[2]=3;a[3]=2;a[4]=1;
	for(k=0;k<5;k++)
	{
		gap=a[k];
		for(i=gap;i<count;i++)
		{
			x=items[i];
			for(j=i-gap;(x<items[j])&&(j>=0);j=j-gap)
			{
				items[j+gap]=items[j];
				shellrecord=1;
				recordin();
			}
			items[j+gap]=x;
		}
	}
}