Hitahara Haruki's Gift

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int S=0,w[n];
    int a=0,b=0;
    for(int i=0;i<n;i++)
    {
        cin>>w[i];
        if(w[i]==100)
            a++;
        else
            b++;
        S+=w[i];
    }
    S/=2;
    if(S%200 == 0)
    {
        cout<<"YES\n";
        return 0;
    }
    if(S%200 == 100)
    {
        if(a>=1)
        cout<<"YES\n";
        else
        cout<<"NO\n";
        return 0;
    }
    cout<<"NO\n";
    return 0;
}