#define _CRT_SECURE_NO_WARNINGS
#define debug(tl) cerr<<#tl<<' '<<tl<<'\n';
#include "bits/stdc++.h"
using namespace std;
#define all(d) d.begin(), d.end()
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
typedef long double ld;
signed main() {
#ifdef _DEBUG
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    srand(time(NULL));
    ll t;
    cin >> t;
    while (t--) {
        ll n;
        cin >> n;
        vector<ll> a(n);
        multiset<ll> x;
        ll sum = 0;
        ll cnt0 = 0;
        for (ll i = 0; i < n; i++) {
            cin >> a[i];
            sum += a[i];
            cnt0 += a[i] == 0;
            if(a[i] != 0)x.insert(a[i]);
        }
        if (n == 4) {
            bool ok = 1;
            for (auto it : x) {
                if (x.find(-it) == x.end()) {
                    ok = 0;
                }
            }
            if (ok) {
                cout << "YES\n";
            }
            else {
                cout << "NO\n";
            }
        }
        else {
            if (x.size() == 2) {
                bool ok = 1;
                for (auto it : x) {
                    if (x.find(-it) == x.end()) {
                        ok = 0;
                    }
                }
                if (ok) {
                    cout << "YES\n";
                }
                else {
                    cout << "NO\n";
                }
            }
            else if (x.size() <=1) {
                cout << "YES\n";
            }
            else {
                cout << "NO\n";
            }
        }

    }
}