#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1e5 + 233;
int a[MAXN];
int main() {
  int n;
  cin >> n;
  long long tot = 0;
  int a1;
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
    tot += a[i];
  }
  sort(a, a + n);
  if (tot % 2 == 1)
    cout << "NO";
  else if (a[n - 1] > tot / 2)
    cout << "NO";
  else
    cout << "YES";
  return 0;
}
