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