Apple Division

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

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);

    ll i, n, j, s = 0, t, ans;
    cin >> n;
     vl a(n);
     for(i = 0; i < n; i++)
     {
        cin >> a[i];
        s += a[i];
     }
     ans = s;

     ll N = (1ll << n);
     for(i = 0; i < N; i++)
     {
         t = 0;
         for(j = 0; (1ll << j) <= i; j++)
            if((1ll << j) & i)
                t += a[j];
        ans = min(ans, abs(s - t - t));
     }
     cout << ans;

    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED