#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, a[100], sum = 0, res = 0;
  cin >> n;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    sum += a[i];
  };
  for (int i = 0; i < n; i++) {
    if ((sum - a[i]) % 2 == 0) res++;
  };
  cout << res << endl;
  return 0;
}
