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