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 Java (OpenJDK 11.0.6) (judge verdict: Accepted)

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

	    // 引数で標準入力System.inを指定する
	    Scanner scanner = new Scanner(System.in);
		try {

		    // 1行目を取得(a)
			String[] line1Array = scanner.nextLine().split(" ");
			int num = Integer.parseInt(line1Array[0]);

			String[] line2Array = scanner.nextLine().split(" ");
			int[] blockArray = new int[line2Array.length];

			for (int i = 0; i < line2Array.length; i++) {
				blockArray[i] = Integer.parseInt(line2Array[i]);
			}

			int answer = 0;

			for (int i = 0; i < blockArray.length; i++) {
				if ((blockArray[i] % 2 == 1) && ((i + 1) %2 == 1)) {
					answer++;
				}
			}

			System.out.printf("%d", answer);

		} finally {
		    // Scannerクラスのインスタンスをクローズ
		    scanner.close();
		}
	}
}