// NOTE: it is recommended to use this even if you don't understand the following code.

#include <fstream>
#include <iostream>
#include <string>
#include <vector>

using namespace std;

int main() {
    // uncomment the two following lines if you want to read/write from files
    // ifstream cin("input.txt");
    // ofstream cout("output.txt");

    int N;
    cin >> N;

    vector<int> T(N);
    for (int i = 0; i < N; ++i)
        cin >> T[i];

    int B = 0;

    int polcdb, kössz ,kh, kell=0;
    // INSERT YOUR CODE HERE
    for (int i = 0; i < N; ++i){
        polcdb= T[i];
        kössz= 1;
        kh= 1;
        while(kössz<polcdb){
         kh*=2;
         kössz+=kh;
         } ;
        kell+=kössz-polcdb;
    }

    cout << kell << endl;

    return 0;
}