#include <bits/stdc++.h>
using namespace std;
const long long logN = 20;
const long long N = 100005;
const long long M = 1000000007;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  long long n;
  cin >> n;
  long long a[n];
  long long m = 0, sum = 0;
  for (long long i = 0; i < n; i++) {
    cin >> a[i];
    m = max(m, a[i]);
    sum += a[i];
  }
  if (n == 1 || sum % 2 == 1 || m > sum - m) {
    cout << "NO"
         << "\n";
    return 0;
  }
  if (n == 2 && a[0] != a[1]) {
    cout << "NO"
         << "\n";
    return 0;
  }
  cout << "YES"
       << "\n";
  return 0;
}
