#include <bits/stdc++.h>
using namespace std;
const int mx = 1e5 + 5;
int main() {
  int n, i;
  cin >> n;
  long long int sum = 0, mx = 0, x;
  for (i = 0; i < n; i++) {
    cin >> x;
    sum += x;
    mx = max(mx, x);
  }
  if (sum % 2 || sum < 2 * mx)
    cout << "NO" << endl;
  else
    cout << "YES" << endl;
}
