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