codeforce - Kitahara Haruki's Gift

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,a=0,b=0,i=1,c;
    cin>>n;
    while(i<=n)
    {
        cin>>c;
        if(c==100)a++;
        else b++;
        i++;
    }
    if(a>0 && a%2==0 && n>=2)cout<< "YES"<<endl;
    else if(b==n && b%2==0)cout<< "YES"<<endl;
    else cout<< "NO"<<endl;
}