#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, i, s = 0, m = -1;
  cin >> n;
  long long arr[n];
  for (i = 0; i < n; ++i) {
    cin >> arr[i];
    m = (m > arr[i] ? m : arr[i]);
    s += arr[i];
  }
  if ((s % 2 == 0) && ((2 * m) <= s)) {
    cout << "YES\n";
  } else
    cout << "NO\n";
  return 0;
}
