#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  long long int sum = 0;
  cin >> n;
  int d[n];
  for (int i = 0; i < n; i++) {
    cin >> d[i];
    sum += d[i];
  }
  if (sum & 1) {
    cout << "NO\n";
    return 0;
  }
  std::sort(d, d + n);
  if (sum - d[n - 1] < d[n - 1] || (sum - 2 * d[n - 1]) % 2 == 1)
    cout << "NO\n";
  else
    cout << "YES\n";
  return 0;
}
