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 C++ (GCC 9.2.1) (judge verdict: Accepted)

#include "bits/stdc++.h"
using namespace std;
#define MODULO 1000000007
#define PI 3.14159265359
typedef long long int ll;
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
     int n,i;
     cin>>n;
     int A[n];
     for(i=0;i<n;++i)
     {
     	cin>>A[i];
	 }
	 int ans=0;
	 for(i=0;i<n;i+=2)
	 {
	 	if(A[i]%2!=0)
	 	ans++;
	 }
	 cout<<ans<<endl;
    return 0;
}