#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int n, sum = 0, cnt = 0;
  cin >> n;
  int arr[n];
  for (int i = 0; i < n; i++) cin >> arr[i], sum += arr[i];
  for (int i = 0; i < n; i++) ((sum - arr[i]) % 2 == 0) ? cnt++ : 0;
  cout << cnt << endl;
}
