# 1

for number in range(1, 20 + 1):

   if not number % 2:

       print(number)

# или

for number in range(2, 20 + 1, 2):

   print(number)

# или

number = 2

while number <= 20:

   print(number)

   number += 2

# 2

k = int(input("K="))

n = int(input("N="))

for _ in range(n):

   print(k)