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 ll long long int
#define LD long double

const int N = 100010;

int inf = 1e9;
int mod = 1e9 + 7;

signed main()
{
    //freopen("IN", "r", stdin);
    //freopen("OUT", "w", stdout);
    int cnt = 0;
    int n; cin >> n;
    for(int i = 1; i <= n; i++) {
        int x; cin >> x;
        if(i % 2 == 1 && x % 2 == 1)
            cnt++;
    }
    cout << cnt << "\n";
    return 0;
}