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)

#define r(x) do{while((x=getchar())<'0'); for(x-='0'; '0'<=(_=getchar()); x=(x<<3)+(x<<1)+_-'0');}while(0)
#include <bits/stdc++.h>
#include <cmath>
#include <fstream>
#define f first
#define endl "\n"
#define s second
#define pb push_back
#define ms(a,b) memset(a,b,sizeof(a))
#define fori(a,b) for(int i=a;i<b;i++)
#define forj(a,b) for(int j=a;j<b;j++)
typedef long long ll;
using namespace std;
typedef vector<int> vi;
typedef pair<int,int> pii;
char _;
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
	int n,ans=0;
	cin>>n;
	
	for(int i=1;i<=n;i++){
		int foo;
		cin >> foo;
		if(i&1 && foo&1) ans++;
	}
	cout << ans << endl;
	return 0;
}