#include <bits/stdc++.h>
using namespace std;
const long long N = 200005;
long long n, a[N], sum;
int main() {
  scanf("%lld\n", &n);
  for (long long i = 0; i < n; i++) {
    scanf("%lld", a + i);
    sum += a[i];
  }
  if (sum % 2 != 0) {
    printf("NO\n");
    return 0;
  }
  for (long long i = 0; i < n; i++) {
    if (sum - a[i] < a[i]) {
      printf("NO\n");
      return 0;
    }
  }
  printf("YES\n");
  return 0;
}
