Resenje XV

1.
	a=int(input())
	b=int(input())
	
	suma=0
	br=0

	for i in range(a,b+1):
		if i%3==0:
			suma=suma+i
			br=br+1
	
	resenje=suma/br
	print(resenje)

2.
	n=int(input())

	suma=0	
	
	for i in range(n+1):
		suma=suma+i/2
	
	print(suma)

3.
	n=int(input())
	
	resenje=0

	for i in range(n):
		a=int(input())
		resenje=resenje*100+a
	
	print(resenje)

4.
	n=int(input())
	
	suma=0
	
	for i in range(2,26):
		if n*i %30 ==0:
			suma=suma+i
	print(suma)

5.	
	n=int(input())
	
	ukupno=0

	for i in range(2,n+1,2):
		brSargarepa=int(input())
		ukupno=ukupno +brSargarepa
	
	k=int(input())

	if(ukupno >= 5*k):
		print("DA")
	else:
		print("NE")

6.

	for i in range(1,20):
		print(i,end="***")