#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 = sum + arr[i];
  }
  int count = 0;
  for (int i = 0; i < n; i++) {
    arr[i] = sum - arr[i];
    if (arr[i] % 2 == 0) count++;
  }
  cout << count;
}
