#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#define endl '\n'
using namespace std;
map <long long, long long> dp[120];
long long f(int pos, long long pr, long long x, vector <long long> &a) {
long long sum = pr;
if (pos < (int)a.size())
sum += a[pos];
if (sum < x && pos >= (int)a.size())
return 1;
if (dp[pos].count(pr))
return dp[pos][pr];
long long ans = f(pos + 1, sum >> 1ll, x, a);
if (sum >= x)
ans += f(pos + 1, (sum - x) >> 1ll, x, a);
return dp[pos][pr] = ans;
}
long long count_tastiness(long long x, vector <long long> a) {
for (int i = 0; i < 120; i++)
dp[i].clear();
return f(0, 0, x, a);
}
/*
int main() {
long long x, n;
cin >> x >> n;
vector <long long> a(n);
for (int i = 0; i < n; i++)
cin >> a[i];
cout << count_tastiness(x, a) << endl;
}
*/
