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: Wrong Answer)

#include <bits/stdc++.h>
#define fi first
#define se second
#define rep(i,n) for (int i=0; i<(n); ++i)
#define rrep(i,n) for (int i=1; i<=(n); ++i)
#define drep(i,n) for (int i=(n)-1; i>=0; --i)
#define srep(i,s,t) for (int i=s; i<t; ++i)ß
#define pi (acos(-1))
//#define pii pair<int,int>
//#define pll pair<ll,ll>
//#define vec vector
template<class T> inline bool chmin(T& a, T b) {
	if (a > b) {
		a = b;
		return true;
	}
	return false;
}
template<class T> inline bool chmax(T& a, T b) {
	if (a < b) {
		a = b;
		return true;
	}
	return false;
}
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef pair<int, int> P;
const int INF = 1001001001;
ll gcd (ll a, ll b) {
  return b ? gcd(b, a%b) : a;
}
ll lcm (ll a, ll b) {
  return a/gcd(a,b)*b;
}

int main(void) {
	int n;
	cin >> n;
	vector<int> a(n);
	rep(i,n) cin >> a[i];
	int ans = 0;
	for (int i=0; i<n; i++) {
		if ((i%2==1 && a[i]%2==1) || (i==1 && a[i]%2==1)) {
			ans++;
		}
	}
	cout << ans << endl;
	return 0;
}