#include <iostream>
#include <math.h>
#include <fstream>
#include <algorithm>

using namespace std;
const int MAX_ = 500;
const int _MAX_ = MAX_ * 500;
int N;
int a[MAX_ + 10];
int p[_MAX_ / 2 + 10][MAX_ + 10];


int main() {
    ifstream in;
    in.open("equation.in");
    ofstream out;
    out.open("equation.out");


    in >> N;
    int suberatel = 0;
    for(int i = 0; i < N; i ++)
    {
        in >> a[i];
        suberatel += a[i];
    }

    if(suberatel % 2 != 0)
    {
        out << "NO";
        return 0;
    }

    int K = suberatel / 2;

    for(int i = 0; i <= K; ++ i)
    {
        p[i][0] = (i == 0);
    }

    for(int j = 1; j <= N; j ++ ) {
        for(int i = 0; i <= K; i ++) {
            if( p[i][j-1])
            {
                p[i][j] = true;
            } else
            {
                if(a[j - 1] > i) continue;
                if(p[i - a[j - 1]][j-1])
                {
                    p[i][j] = true;
                }
            }
        }
    }
            out << (p[K][N] == 1 ? "YES" : "NO");
}