#include <bits/stdc++.h>
using namespace std;
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long n;
  cin >> n;
  vector<long long> a(n);
  long long sums = 0;
  for (long long i = 0; i < n; i++) {
    cin >> a[i];
    sums += a[i];
  }
  if (sums % 2 == 0) {
    long long maxs = -1;
    for (long long i = 0; i < n; i++) {
      if (a[i] > maxs) maxs = a[i];
    }
    if (maxs > sums - maxs) {
      cout << "NO\n";
    } else {
      cout << "YES\n";
    }
  } else {
    cout << "NO\n";
  }
}
