#include <bits/stdc++.h>
using namespace std;
long long n, m, a, s;
int main() {
  ios_base::sync_with_stdio(false);
  cin >> n;
  for (long long i = 1; i <= n; i++) {
    cin >> a;
    s += a;
    m = max(m, a);
  }
  if (s % 2 == 1 || s < 2 * m) {
    cout << "NO";
    return 0;
  }
  cout << "YES";
  return 0;
}
