#олимпиада Сириус(отбор)🧑‍💻 a=int(input())

#олимпиада Сириус(отбор)🧑‍💻 a=int(input())
spisok=[]
for i in range(a):
b=int(input())
spisok.append(b)
count=0
for i in range(len(spisok)):
if i%2 ==0 and spisok[i]%2==0:
count=count+1
print(count)