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