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++ (Clang 10.0.0) (judge verdict: Accepted)

#pragma warning(disable: 4996)
#include <string>
#include <vector>
#include <iostream>
#include <cstdio>
#include <sstream>
#include <fstream>

using namespace std;
typedef long long ll;
#define rep(i,n) for (int i = 0; i < (n); i++)

int main() {
    int n,ans = 0;
    int a[100];
    cin >> n;
    rep(i, n) cin >> a[i];

    rep(i, n) {
        if ((i + 1) % 2 == 1 && a[i] % 2 == 1) ans++;
    }
    cout << ans << endl;
}