Submission #1289760

#	Time	Username	Problem	Language	Result	Execution time	Memory
1289760		erkam	Norela (info1cup18_norela)	C++20	0 / 100	1 ms	332 KiB

norela

#include <iostream>

using namespace std;

int n, m;
long long ans;
long long arr[25];
long long goal;

void solve(int cur_index, long long cur_mask, int cur_ans) {
    if ((cur_mask ^ arr[cur_index]) == goal) {
        cur_ans += (1ll << (m-cur_index-1));
        ans = max(ans, (long long)cur_ans);
        return;
    }
    if (cur_index == m-1) {
        return;
    }
    solve(cur_index + 1, cur_mask ^ arr[cur_index], cur_ans + (1ll << (m-cur_index-1)));
    solve(cur_index + 1, cur_mask, cur_ans);
}

int main() {
    cin >> n >> m;
    goal = (1ll << n) - 1;
    for(int i = 0; i < m; i++) {
        int q; cin >> q;
        for(int j = 0; j < q; j++) {
            int x; cin >> x;
            arr[i] += 1ll << (x-1);
        }
    }
    solve(0, 0, 0);
    cout << __builtin_popcountll(ans) << endl;
    for(int i = 1; i <= m; i++) {
        if (ans & (1ll << (m-i))) {
            cout << i << " ";
        }
    }
    cout << endl;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25