CF 1201B.cpp

#include <bits/stdc++.h>
using namespace std;
#define test int t; cin>>t; while (t--)
#define ll long long int
#define fellow_junior  ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int main()
{
   fellow_junior
   ll a[200000],c,d=0,e,f,i,j,k,l;
   cin>>c;
   for(i=0;i<c;i++)
   {
       cin>>a[i];
       d+=a[i];
   }
   sort(a,a+c);
   if(d%2==0 && a[c-1]<=d/2) cout<<"YES"<<'\n';
   else cout<<"NO"<<'\n';
   return 0;
}