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 Scanner scan  = new Scanner(System.in);
    public static void main(String[]args){
        int n =nextInt();
        int con = 0;
        int[] arr = new int[n];
        for(int i=0;i<n;i++){
            arr[i] = nextInt();
        }
        for(int i=0;i<n;i++){
            if((i+1)%2==1){
                if(arr[i]%2==1){
                    con +=1;
                }
            }
        }
        print(con);
    }

    public static int nextInt(){
        return Integer.parseInt(scan.next());
    }
    public static long nextLong(){
        return Long.parseLong(scan.next());
    }
    public static String next(){
        return scan.next();
    }
    public static double nextDouble(){
        return Double.parseDouble(scan.next());
    }
    public static float nextFloat(){
        return Float.parseFloat(scan.next());
    }

    //Yes or No
    public static void yesNo(boolean flag){
        if(flag) System.out.println("Yes");
        else System.out.println("No");
    }

    //print
    public static void print(Object a){
        System.out.println(a);
    }


    //gcd
    public static int gcd (int a, int b){
        int tmp;
        while((tmp = a%b) != 0){
            a = b;
            b = tmp;
        }
        return b;
    }


    //lcm
    public static int lcm(int a,int b){
        int tmp;
        long c = a;
        c *= b;
        while((tmp = a%b) != 0){
            a = b;
            b = tmp;
        }
        return (int)(c/b);
    }
}