#include <bits/stdc++.h>
using namespace std;
int aa[100002];
int main() {
  long long n;
  cin >> n;
  long long a = 0;
  long long sum = 0;
  for (int i = 0; i < n; i++) {
    cin >> a;
    aa[i] = a;
    sum = sum + a;
  }
  sort(aa, aa + n);
  if (sum % 2 == 1) {
    printf("NO");
    return 0;
  } else if (aa[n - 1] > (sum / 2))
    printf("NO");
  else
    printf("YES");
  return 0;
}
