#include "biscuits.h"
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
vector<ll> v;
ll rec(int i, ll x) { // the last x are blocked, find total number of blocked
// cout << "test\n";
// cout << i << ' ' << x << '\n';
// if(x == 0) {
// if(i == (int)v.size()) return 0;
// return v[i];
// }
if(i == 0) {
if(v.size() == 0) return x;
if(x == 1) return x;
return v[i];
}
if(x < ((ll)1 << (i))) {
return v[i-1] + rec(i-1, x);
}
return ((ll)1 << (i)) + rec(i-1, x - ((ll)1 << (i)));
}
long long count_tastiness(long long x, std::vector<long long> a) {
vector<ll>().swap(v);
ll tot = 0;
for(int i = 0; i < 61; i++) {
if(i == (int)a.size()) a.push_back(0);
tot += ((ll)1 << i)*a[i];
if(tot >= x*((ll)1 << (i+1)) - 1) v.push_back(rec(i, 0));
else v.push_back(rec(i, ((ll)1 << (i+1)) - tot/x - 1));
// cout << "v[i] is " << v[i] << '\n';
}
return ((ll)1 << 61) - v[60];
}
