"""
i = 0
while i <= 10:
print (i)
i = i +1
liczba = int(input("podaj liczbe: "))
suma = 0
while liczba != 0:
liczba = int(input("podaj liczbe: "))
suma = suma + liczba
print(suma)
i = 0
ile = 0
while i <= 100:
if i%2 == 0:
ile = ile + 1
i = i + 1
print(ile)
"""
i = 0
ile = 0
while i <= 100:
if i%2 == 0 and i%10 == 4 or i%10 == 8:
ile = ile + 1
i = i + 1
print(ile)
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