#include <bits/stdc++.h>
int main() {
  long long n, i, s = 0, max = 0;
  scanf("%lld", &n);
  int a[n];
  for (i = 0; i < n; i++) {
    scanf("%lld", &a[i]);
    s += a[i];
    if (a[i] > max) max = a[i];
  }
  if (s % 2 == 0 && max <= s - max)
    printf("YES\n");
  else
    printf("NO\n");
  return 0;
}
