#include <iostream>
#include <fstream>
#include <iomanip>

#include <vector>
#include <set>
#include <bitset>
#include <map>
#include <deque>
#include <string>

#include <algorithm>
#include <numeric>
#include <random>

#include <cstdio>
#include <cassert>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <cmath>

using namespace std;

#define forn(i, n) for (ll i = 0; i < (ll) (n); ++i)
#define sz(a) static_cast<int>((a).size())
#define endl '\n'

using ll = long long;

const ll INF = static_cast<ll>(1e9) + 7;
const int MAXN = static_cast<int>(4e5) + 17;

int n;
int a[MAXN];

bool read() {
    if (!(cin >> n))
        return false;

    forn (i, n)
        cin >> a[i];

    return true;
}

void solve() {

    ll ans = 0;

}

int main() {
    cin.tie(nullptr);
    std::ios_base::sync_with_stdio(false);


    while (read())
        solve();

    return 0;
};