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

template<class T> istream& operator >> (istream& is, vector<T>& vec) {
    for(T& x : vec) is >> x;
    return is;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int N;
    cin >> N;
    vector<int> A(N);
    cin >> A;
    sort(A.begin(), A.end());

    ll s = accumulate(A.begin(), A.end(), 0ll);
    if(s - A.back() <= 0 && A.back() >= 0){
        cout << "Yes\n";
        return 0;
    }
    if(s - A[0] >= 0 && A[0] <= 0){
        cout << "Yes\n";
        return 0;
    }
    cout << "No\n";
}