#include <bits/stdc++.h>
using namespace std;
const long long MOD = 1e9 + 7;
const long long INF = 1e18;
const long long MX = 3e5 + 5;
const long double PI = 4 * atan((long double)1);
int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  long long n;
  cin >> n;
  long long a[n];
  long long sum = 0;
  for (long long i = 0; i < n; i++) {
    cin >> a[i];
    sum += a[i];
  }
  sort(a, a + n);
  if (sum % 2 or 2 * a[n - 1] > sum)
    cout << "NO" << '\n';
  else
    cout << "YES" << '\n';
}
