제출 #1318952

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1318952		hssaan_arif	Norela (info1cup18_norela)	C++20	0 / 100	15 ms	424 KiB

norela

// #include <bits/stdc++.h>
#include <iostream>
#include <cmath>
#include <algorithm>
#include <map>
#include <unordered_map>
#include <vector>
#include <iomanip>
#include <string>
#include <queue>
#include <set>
#include <deque>
using namespace std;

#define endl "\n"
#define pb push_back
#define int long long
#define fi first
#define se second

const int N = 3e5 + 5, M = 1e9 + 7, LG = 20;

int n , A[N] , x , sz , m;

void solve(){
    cin >> n >> m;

    for (int i=0 ; i<m ; i++){
        cin >> sz;
        int u = 0;
        for (int j=0 ; j<sz ; j++){
            cin >> x;
            u += (1<<(x-1));
            // cout << x << ' ';
        }
        A[i] = u;
        // cout << A[i] << endl;
    }

    // int ans = 1e18;
    int h = 1e18;
    vector<int> f(n+10 , 1e18);

    for (int j=0 ; j<(1<<m) ; j++){
        int k = 0 , cn = 0;
        for (int i=0 ; i<m ; i++){
            if ((1<<i) & j){
                k ^= A[i];
                // cout << A[i] << ' ';
                cn++;
            }
        }

        if (k == (1<<n) - 1){
            // cout << j << ' ' << cn << ' ' << k << endl;

            vector<int> g;
            for (int i=0 ; i<m ; i++){
                if ((1<<i) & j){
                    g.pb(i+1);
                }
            }

            if (h > cn){
                h = cn;
                swap(f,g);
                continue;
            }

            if (g < f && h==cn){
                swap(g,f);
            }
        }
    }

    cout << f.size() << endl;
    for (int i : f) cout << i << ' ';
    
    cout << endl;
}

signed main(){
    // freopen("" , "r" , stdin);
    // freopen("" , "w" , stdout);
    // cout << setprecision(30);
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int ts = 1;
    // cin >> ts;
    while(ts--){
        solve();
    }
}

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