2，6，8，9，10WA了，求助（数据下下来太大了调不了），code：

#include <iostream>
#include <vector>
#include <cstring>

const int U = 30,G = 20;

int u,g,a[U],b[G][U];
std::vector<int> choose,ans;

void dfs(int x){

    if (x > g){

        int cnt[G];

        memset(cnt,0,sizeof(cnt));
        for (int i : choose)
            for (int j = 1;j <= g;j++)
                cnt[j] += b[i][j];
        for (int i = 1;i <= g;i++)
            if (cnt[i] < a[i])
                return;
        if (ans.empty() || choose.size() < ans.size()) ans = choose;
        return;

    }
    choose.push_back(x);
    dfs(x + 1);
    choose.pop_back();
    dfs(x + 1);

}

int main(){

    #ifndef ONLINE_JUDGE
        freopen("P1460.in","r",stdin);
        freopen("P1460.out","w",stdout);
        struct NORE{~NORE(){exit(0);}}_;
    #endif

    std::cin.tie(0)->sync_with_stdio(0);
    
    std::cin >> u;
    for (int i = 1;i <= u;i++) std::cin >> a[i];
    std::cin >> g;
    for (int i = 1;i <= g;i++)
        for (int j = 1;j <= u;j++)
            std::cin >> b[i][j];
    dfs(1);
    std::cout << ans.size() << ' ';
    for (int i : ans) std::cout << i << ' ';

    return 0;
}