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