#include <bits/stdc++.h>
using namespace std;

#define official

#ifdef official
#define cin inF
#define cout outF
#endif

ifstream inF("equation.in");
ofstream outF("equation.out");

const int MAX_N = 512;
const int MAX_VAL = MAX_N * MAX_N;
int n;
int a[MAX_N];

bool poss[2][MAX_VAL * 2 + 10];

bool ans;

void input()
{
    cin >> n;
    for (int i = 0; i < n; ++i)
    {
        cin >> a[i];
    }
}

void output()
{
    if (ans) cout << "YES\n";
    else cout << "NO\n";
}

void solve()
{
    bool curr = 0;
    poss[curr][MAX_VAL] = true;
    for (int i = 0; i < n; ++i)
    {
        curr = !curr;
        for (int v = -MAX_VAL; v <= MAX_VAL; ++v)
        {
            poss[curr][v + MAX_VAL] = poss[!curr][v - a[i] + MAX_VAL] || poss[!curr][v + a[i] + MAX_VAL];
        }
    }
    ans = poss[curr][MAX_VAL];
}

int main()
{
    input();
    solve();
    output();

    return 0;
}