#include <bits/stdc++.h>
using namespace std;
int a[100010];
int main() {
  int n;
  scanf("%d", &n);
  for (int i = 0; i < n; i++) scanf("%d", &a[i]);
  sort(a, a + n);
  long long sum = 0;
  for (int i = 0; i < n; i++) sum += a[i];
  if (sum % 2)
    printf("NO\n");
  else if (sum < (long long)a[n - 1] * 2)
    printf("NO\n");
  else
    printf("YES\n");
  return 0;
}
