#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<ll, ll>;
#define rep(i, a, b) for(ll i = a; i < b; ++i)
#define rrep(i, a, b) for(ll i = a; i >= b; --i)
constexpr ll inf = 4e18;
struct SetupIO {
    SetupIO() {
        ios::sync_with_stdio(0);
        cin.tie(0);
        cout << fixed << setprecision(30);
    }
} setup_io;
int main(void) {
    ll n;
    cin >> n;
    vector<ll> a(n);
    vector<ll> pos, neg;
    ll ps = 0, ns = 0;
    rep(i, 0, n) {
        cin >> a[i];
        if(a[i] >= 0) {
            pos.push_back(a[i]);
            ps += a[i];
        } else {
            neg.push_back(a[i]);
            ns += a[i];
        }
    }
    ranges::sort(pos);
    ranges::sort(neg);
    if(abs(ps) >= abs(ns)) {
        ps -= pos.back();
        if(abs(ps) <= abs(ns)) {
            cout << "Yes" << '\n';
        } else {
            cout << "No" << '\n';
        }
    } else {
        ns -= neg[0];
        if(abs(ps) >= abs(ns)) {
            cout << "Yes" << '\n';
        } else {
            cout << "No" << '\n';
        }
    }
}