#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int arr[n];
  int sum = 0;
  for (int i = 0; i < n; i++) {
    cin >> arr[i];
    sum += arr[i];
  }
  int res = 0;
  for (int i = 0; i < n; i++) {
    if ((sum - arr[i]) % 2 == 0) res++;
  }
  cout << res << endl;
  return 0;
}
