#include "biscuits.h"
#include "bits/stdc++.h"
#pragma GCC optimize("O3")
using namespace std;
typedef long long ll;
#define pb push_back
map<ll,ll>m[67];
ll k,n,d[67],f[67];
ll S(ll x,ll y){
if(x>=k && y<n)return 1;
y+=d[x];
if(y<n)return S(x+1,y/2+f[x]);
//cout<<"! "<<x<<" "<<y<<endl;
if(m[x][y]!=0)return m[x][y];
m[x][y]+=S(x+1,y/2+f[x]);
if(y>=n)m[x][y]+=S(x+1,(y-n)/2);
//cout<<x<<" "<<y<<" "<<m[x][y]<<endl;
return m[x][y];
}
long long count_tastiness(long long x, std::vector<long long> a) {
k=a.size();
n=x;
for(int i=0;i<=65;i++){
m[i].clear();
d[i]=0;
a.pb(0);
}
for(int i=0;i<k;i++){
d[i]=a[i];
if(d[i]>n){
d[i+1]+=(d[i]-n)/2;
f[i]=((d[i]-n)%2)*(n%2);
d[i]=n;
}
}
//cout<<"! "<<S(0,0)<<endl;
return S(0,0);
}
