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