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.

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.

Constraints

• All values in input are integers.
• $1 \leq N, a_i \leq 100$

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

见题面 Input 部分

见题面 Output 部分