#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  int n;
  cin >> n;
  int arr[n];
  long long int sum = 0;
  for (int i = 0; i < n; i++) {
    cin >> arr[i];
    sum += arr[i];
  }
  if (n == 1 || sum % 2 == 1) {
    cout << "NO";
    return 0;
  }
  sort(arr, arr + n);
  long long int remsum = sum - arr[n - 1];
  if (arr[n - 1] <= remsum)
    cout << "YES";
  else
    cout << "NO";
}
