#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  scanf("%d", &n);
  long long a[n];
  for (long long &x : a) scanf("%lld", &x);
  long long sum = 0;
  sort(a, a + n);
  for (long long x : a) sum += x;
  int ok = 0;
  if (sum - a[n - 1] >= a[n - 1] && sum % 2 == 0) ok = 1;
  if (ok)
    cout << "YES\n";
  else
    cout << "NO\n";
  return 0;
}
