#include <bits/stdc++.h>
using namespace std;
const int mod=1e9+7;
long long arr[10000],dp[10050],n,m,minn=10000;
int main() {
	ios::sync_with_stdio(false);
	cin.tie(0),cout.tie(0);
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		cin>>arr[i];
		minn=min(minn,arr[i]);
	}
	dp[0]=1;
	for(int i=1;i<=m;i++){
		for(int j=1;j<=n;j++){
			int l=2;
			if(i<arr[j]){
				continue;
			}
			dp[i]=(dp[i-arr[j]]+dp[i])%mod;
			dp[i]/=l;
		}
	}
	cout<<dp[m];
	return 0;
}

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

NiAxNQoxIDUgMTAgMjAgNTAgMTAw

6 15
1 5 10 20 50 100