#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n;
  int i;
  cin >> n;
  vector<long long> a(n);
  long long sum = 0;
  for (i = 0; i < n; i++) {
    cin >> a[i];
    sum += a[i];
  }
  if (sum & 1) {
    cout << "NO";
    return 0;
  }
  sort(a.rbegin(), a.rend());
  if (a[0] > sum / 2) {
    cout << "NO";
    return 0;
  }
  cout << "YES";
  return 0;
}
