#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
 
    int N; cin >> N;
    vector<long long> H(N);
    for(auto &h : H) cin >> h;
    sort(H.begin(),H.end());

    auto memo = H;
    long long answer = 0,pos = 0,p = 1,inf = 2e18;
    while(pos < N){
        if(H.at(pos) <= 0) break;
        answer++;
        if(H.at(pos) > p) H.back() -= p;
        else pos++;
        p = min(p*2,inf);
    }
    H = memo;
    p = 1;
    long long answer2 = 0;
    for(auto h : H){
        while(h > 0) h -= p,p = min(p*2,inf),answer2++;
    }
    answer = min(answer,answer2);
    answer2 = 0;

    long long bring = 0;
    for(int i=0; i<60; i++){
        for(auto &h : H) bring += (h>>i)&1;
        if(bring) answer2 = i+1,bring--;
    }
    answer2 += bring;
    answer = min(answer,answer2);
    cout << answer << endl;
}