#include <bits/stdc++.h>
using namespace std;
const long long N = 3e6 + 3;
const long long M = 250;
const long long mod = 1e9 + 7;
const long long rx[4] = {1, -1, 0, 0};
const long long ry[4] = {0, 0, 1, -1};
vector<long long> a;
map<long long, long long> mp;
long long n, k;
int32_t main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  srand(time(0));
  cin >> n;
  long long sum = 0;
  long long ma = 0;
  for (long long i = 0; i < n; i++) {
    long long x;
    cin >> x;
    sum += x;
    a.push_back(x);
    ma = max(ma, x);
  }
  if (sum % 2 == 0 && ma <= sum - ma) {
    cout << "YES";
    return 0;
  }
  cout << "NO";
}
