#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int t, item, even = 0, odd = 0, mx = 0, sum = 0;
  cin >> t;
  priority_queue<long long int> pq;
  for (long long int i = 1; i <= t; i++) {
    cin >> item;
    sum += item;
    if (item > mx) mx = item;
  }
  if (sum % 2 == 0 && sum - mx >= mx)
    cout << "YES" << endl;
  else
    cout << "NO" << endl;
  return 0;
}
