Pizzeria

#include <iostream>
#include <set>
#include <vector>

using namespace std;
typedef long long LL;

int main(){
    cin.tie(0);
    ios_base::sync_with_stdio(0);
    LL n; cin >> n;
    LL mod = 1e9 + 7;
    LL ans = 1;
    for(int i = 0; i < n-1; i++){
        ans = (2 * ans) % mod;
    }
    LL S = 0;
    for(int i = 0; i < n; i++){
        LL x; cin >> x;
        S += x;
        S %= mod;
    }
    cout << (ans * S) % mod << endl;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED