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