#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  vector<long long> A(n);
  for (int i = 0; i < n; ++i) cin >> A[i];
  sort(A.begin(), A.end());
  long long sum = accumulate(A.begin(), A.end(), 0ll);
  if (sum % 2 == 0 and (sum - A.back()) >= A.back())
    cout << "YES\n";
  else
    cout << "NO\n";
}
