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