#include <iostream>
#include <math.h>
#include <fstream>
#include <algorithm>
using namespace std;
const int MAX_N = 500;
const int MAX_K = MAX_N * 500;
int N;
int a[MAX_N + 10];
int p[MAX_K / 2 + 10][MAX_N + 10];

int main() {

    ifstream in;
    in.open("equation.in");
    ofstream out;
    out.open("equation.out");
    in >> N;
    int sum = 0;
    for(int i = 0; i < N; i ++) {
        in >> a[i];
        sum += a[i];
    }
    if(sum % 2 != 0) {
        out << "NO";
        return 0;
    }
    int K = sum / 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");
}