#include "biscuits.h"
#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
typedef vector<ll> vi;
typedef vector<vi> vvi;
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
const ll bound = 2 * 1e18;
ll X;
ll ans = 0;
vi A;
void check(int idx, ll force)
{
assert(force <= bound);
if (idx >= sz(A) && force <= 0)
return;
if (force >= X)
{
++ans;
ll nforce = (force - X) / 2;
if (idx + 1 < sz(A))
nforce += A[idx + 1];
check(idx + 1, nforce);
}
force /= 2;
if (idx + 1 < sz(A))
force += A[idx + 1];
check(idx + 1, force);
}
long long count_tastiness(long long _X, std::vector<long long> a)
{
X = _X;
ans = 1;
A = vi(all(a));
check(0, A[0]);
return ans;
}
