Problem:
Score : 200 points

Problem Statement

We have N squares assigned the numbers 1,2,3,\ldots,N. Each square has an integer written on it, and the integer written on Square i is a_i.

How many squares i satisfy both of the following conditions?

The assigned number, i, is odd.

The written integer is odd.

Constraints

All values in input are integers.

1 \leq N, a_i \leq 100

Input

Input is given from Standard Input in the following format:

N
a_1 a_2 \cdots a_N

Output

Print the number of squares that satisfy both of the conditions.

Sample Input 1

5
1 3 4 5 7

Sample Output 1

2

Two squares, Square 1 and 5, satisfy both of the conditions.

For Square 2 and 4, the assigned numbers are not odd.

For Square 3, the written integer is not odd.

Sample Input 2

15
13 76 46 15 50 98 93 77 31 43 84 90 6 24 14

Sample Output 2

3

Solution in Python (3.8.2) (judge verdict: Accepted)

#マス i には ai が書かれています
#奇数番目に奇数が書かれている数

N = int(input())
l = input().rstrip().split(" ")
a = list(map(int, l))
#print(a)

ans = 0
for i in range(len(a)):
    if i % 2 == 1:  #奇数番目の番号は偶数なので
        continue
    else:
        if a[i] % 2 == 1:
            ans += 1
print(ans)