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 Scala (2.13.1) (judge verdict: Wrong Answer)

object Main extends App {
  val sc = new java.util.Scanner(System.in)
  val numLength = sc.nextInt
  val numSeq = Seq.fill(numLength)(sc.nextInt).zipWithIndex
    val resultSeq = for{
    n   <- numSeq
    n1  =  if(n._1 % 2 != 0) n._1 else 0
    n2  =  if(n._2 % 2 == 0 || n._2 == 0)n._2  else 0
    res =  if(n1 > 0 && n2 > 0) 1 else 0
  } yield res
  val result = resultSeq.filter(_ > 0).sum
  println(result)
}