#define DEBUG 0

#include<stdio.h>
#include<dos.h>
#include<conio.h>
#include<math.h>
#include<string.h>
#include<ctype.h>
#include<graphics.h>
#include<stdlib.h>

main()
{
	char far *f = (char far *)0xB0008000;
	int num,temp,digit,sum=0;
	clrscr();
	for(temp=1;temp<4001;temp+=2)
		*(f+temp)=89;
	printf("\nEnter a number NOW !\t");
	scanf("%d",&num);
	temp=num;
	while(temp)
	{
		digit=temp%10;
		temp/=10;
		sum+=digit;
#if DEBUG == 1
		printf("\ntemp=%d\tdigit=%d",temp,digit);
#endif
	}
	printf("\nSum=%d",sum);
	getch();
}