#include using namespace std; #define MOD 1000000007 #define ll long long int #define lu long int int main() { int n; int arr[40]; cin>>n; for(int i=0; i>arr[i]; } sort(arr, arr+n); ll ans=0, two=1; for(int i=n-1; i>=0; --i){ ans += two*arr[i]; two *= 2; } cout<