#include <bits/stdc++.h>
using namespace std;
int main() {
  long n, d = 0, e = 0, a[10000] = {0}, c = 0;
  cin >> n;
  for (long i = 0; i < n; i++) {
    cin >> a[i];
    c = c + a[i];
  }
  for (long j = 0; j < n; j++) {
    d = c - a[j];
    if ((d % 2) == 0) {
      e = e + 1;
    }
  }
  cout << e;
  return 0;
}
