#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    int n;
    cin >> n;
    multiset<int> N, P;
    rep(i,n) {
        int a;
        cin >> a;
        if(a>0) P.insert(a);
        else N.insert(a);
    }
    while(n--) {
        if(P.size()+N.size()==1){
            cout<<"Yes"<<endl;
            return 0;
        }
        if(P.empty() || N.empty()) {
            cout<<"No"<<endl;
            return 0;
        }
        if(P.size()>N.size()) {
            int r = *N.begin();
            int s = *P.begin();
            N.erase(r);
            P.erase(s);
            if(r+s>0) {
                P.insert(r+s);
            }
            else{
                N.insert(r+s);
            }
        }
        else{
            int r = *N.rbegin();
            int s = *P.rbegin();
            N.erase(r);
            P.erase(s);
            if(r+s>0) {
                P.insert(r+s);
            }
            else{
                N.insert(r+s);
            }
        }
    }
    return 0;
}