#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;

void dfs(vector<int> &a,vector<vector<int>> &res,vector<int> &tmp,int target,int index)
{
    if(target==0)
        res.push_back(tmp);
    else 
    {
        for(int i=index;i<a.size();i++)
        {
            if
 
(i > index && a[i] == a[i-1]) continue;
            tmp.push_back(a[i]);
            dfs(a,res,tmp,target-a[i],i+1);
            tmp.pop_back();
        }
    }
}

vector<vector<int>> find(vector<int> a,int target)
{
    vector<vector<int>> res;
    vector<int
 
> tmp;
    sort(a.begin(),a.end());
    dfs(a,res,tmp,target,0);
    return res;
}


int main()
{
    int n;

    while(cin>>n)
    {
        vector<int>a(n,0);
        for(int i=0;i<n;i++)
            cin>>a[i];
        int target;
        cin>>target;
        vector<vector
 
<int>> res=find(a,target);
        for(int i=0;i<res.size();i++)
        {
            for(int j=0;j<res[i].size();j++)
                cout<<res[i][j]<<" ";
            cout<<endl;
        }
    }
    return 0;
}

這個程式碼有個問題，target不能為0，還沒修改好