# include <stdio.h>

int sum(int low,int upper)
{
	/** midenizo to sum **/
	int s=0;
	/** metritis **/
	int i;
	
	for(i=low;i<=upper;i++)
	{
		s=s+i;/** 2 3 4 5 **/
	}
	return s;
}

/** mesos oros timon **/
double average(int low,int upper)
{
	
	int s=0;
	double avg;
	s=sum(low,upper);
	avg=((double)s)/(upper-low+1);
	return avg;		
}


int main()
{
	
	int a,b,s;
	double x;
	s=sum(1,4);
	/*
	printf("S = %d \n",s);
	
	printf("Dose to kato orio ?");
	scanf("%d",&a);
	printf("Dose to pano orio ?");
	scanf("%d",&b);
	if(a>b) s=sum(b,a);
	else
	s=sum(a,b);
	printf("Apotelesma = %d\n",s);
	*/
	x=average(1,4);
	printf("Sum is %d Average=%lf \n",s,x);
	return 0;
}