#include <bits/stdc++.h>
using namespace std;
#define TRACE(x) cerr << #x << " :: " << x << endl
#define _ << " " <<
#define SZ(x) (int)(x).size()
#define ALL(x) (x).begin(),(x).end()
#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
#define RFOR(i,a,b) for (int i=(a);i>=(b);--i)
using ii=pair<long long,int>;
const int mxN = 2e5+5;
int N;
multiset<ii> ms;
map<int,ii> mp;
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
cin >> N;
FOR(i,1,N){
int A; cin >> A;
ms.insert(ii(A,i));
mp[i] = ii(A,1);
}
long long ans = 0;
FOR(_i,1,(N+1)/2){
//~ cout << _i << ":: "; for (auto& x : ms) { cout << x.first << ' '; } cout << endl;
auto i = prev(ms.end());
ans += i->first;
int idx = i->second;
auto y = mp.find(idx);
ii nw = ii(-y->second.first, -y->second.second);
if (y != mp.begin()) {
auto x = prev(y);
ms.erase(ii(x->second.first,x->first));
nw.first += x->second.first;
nw.second += x->second.second;
mp.erase(x);
}
if (next(y) != mp.end()) {
auto z = next(y);
ms.erase(ii(z->second.first,z->first));
nw.first += z->second.first;
nw.second += z->second.second;
mp.erase(z);
}
ms.erase(i);
mp.erase(y);
if (nw.second > 0) ms.insert(ii(nw.first, idx));
mp[idx] = nw;
//~ cout << _i << ":: "; for (auto& x : mp) { cout << x.second.first << ' '; } cout << endl;
cout << ans << '\n';
}
}
