#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 50;
int main() {
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  int n, a, arr[N];
  long long sum = 0;
  cin >> n;
  for (int i = 0; i < n; ++i) {
    cin >> arr[i];
    sum += arr[i];
  }
  sort(arr, arr + n);
  if (sum % 2 == 0 && sum - arr[n - 1] >= arr[n - 1])
    cout << "YES\n";
  else
    cout << "NO\n";
  return 0;
}
