1:

for i in range (1000,10000):

i = str(i)

if int(i[3]) % 5 == 0:

print()

print(int(i), end=' ')

2:

n = int(input())

summ = 1

for i in range(1, n + 1):

summ *= abs(i)

print(summ)

3:

i = 1

a = 0

while(i <= 9999):

a += 1 / i

i += 2

i = 2

b = 0

while(i <= 10000):

b += 1 / i

i += 2

print(a - b)

4:

x, m, n= map(int, input().split())

summ = 1

for i in range(m,n+1):

if i % x == 0:

summ *= i

print(summ)

5:

lst = [int(i) for i in input().split()]

count = 0

summ = 0

for i in lst:

if len(str(i)) == 1:

count += 1

summ += i

print(summ / count)