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)

// https://atcoder.jp/contests/aising2020/tasks/aising2020_b
#include <iostream>
#include <cstring>
#include <cmath>
#include <vector>
#include <set>
#include <queue>
#include <algorithm>

using namespace std;
#define lli long long int
#define numberofdigits(x) floor(log10(x)) + 1

int main()
{
    lli n,i,a[105],c=0;
    cin>>n;
    for(i=1;i<=n;i++)
        cin>>a[i];
    for(i=1;i<=n;i++)
        if((a[i]&1) && (i&1))
            c++;
    cout<<c<<"\n";
    return 0;
}