#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n, i;
  cin >> n;
  long *a = new long[n];
  long long sum = 0;
  for (i = 0; i < n; i++) {
    cin >> a[i];
    sum += a[i];
  }
  bool is_possible = false;
  if (sum % 2 == 0) {
    is_possible = true;
    for (i = 0; i < n; i++) {
      if (sum - a[i] < a[i]) {
        is_possible = false;
        break;
      }
    }
  }
  if (is_possible)
    cout << "YES";
  else
    cout << "NO";
  return 0;
}
