#include <bits/stdc++.h>
using namespace std;
int n;
long long sum = 0, m1 = 0;
int main() {
  scanf("%d", &n);
  for (int i = 1; i <= n; ++i) {
    int x;
    scanf("%d", &x);
    sum += x;
    m1 = max(m1, (long long)x);
  }
  if (m1 <= sum / 2 && sum % 2 == 0)
    printf("YES\n");
  else
    printf("NO\n");
  return 0;
}
