// editor1
#include<iostream>
#include<vector>
using namespace std;
int main()
{
    int n,amount;
    if(!(cin>>n)||n<0){cout<<"Invalid input";return 0;}
    vector<int>coins(n);
    bool invalid =false;
    for(int i=0;i<n;i++){
        cin>>coins[i]<0 invalid =true;
    }
    if(!(cin>>amount)||amount<0) invalid =true;
    if (invalid) { cout<<"Invalid input"; return 0;}
    vector<long long> dp(amount+1,0);
    dp[0]=1;
    for (int coin : coin){
        for(int i = coin; i<=amounnt;i++){
            dp[i]+=dp[i-coin];
        }
    }
    if(dp[amount]==0) cout<<"No";
    else cout<<dp[amount];
    return 0;
}