Submission #529542

#	Time	Username	Problem	Language	Result	Execution time	Memory
529542		Vimmer	Hiperkocka (COCI21_hiperkocka)	C++14	110 / 110	85 ms	32520 KiB

Main

#include <bits/stdc++.h>
#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)

//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")

#define F first
#define S second
#define PB push_back
#define M ll(998244353)
#define sz(x) (ll)x.size()
#define N 1000005
#define pri(x) cout << x << endl
#define endl '\n'
#define all(x) (x).begin(), (x).end()
#define _ << " " <<

using namespace std;
//typedef tree <ll, null_type, less_equal <ll> , rb_tree_tag, tree_order_statistics_node_update> ordered_set;
//using namespace __gnu_pbds;
typedef long long ll;
typedef long double ld;
typedef short int si;
typedef unsigned long long ull;

vector <pair <int, int> > g[N];

vector <int> cube;

void dfs(int v, int x, int p)
{
    cube[v] = x;

    for (auto it : g[v])
    {
        if (it.F == p)
            continue;

        dfs(it.F, x ^ (1 << it.S), v);
    }
}

int main()
{
    istream::sync_with_stdio(0); ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

//    freopen("1.in", "r", stdin);
//    freopen("trains.in", "r", stdin);
//    freopen("trains.out", "w", stdout);

    int n;

    cin >> n;

    for (int i = 0; i < n; i++)
    {
        int x, y;

        cin >> x >> y;

        g[x].PB({y, i});

        g[y].PB({x, i});
    }

    cube.resize(n + 1);

    dfs(0, 0, -1);

    vector <vector <int> > ans; ans.clear();

    for (int i = 0; i < (1 << n); i++)
        if (__builtin_popcount(i) % 2 == 0)
        {
            ans.emplace_back();

            for (auto it : cube)
                ans.back().PB(it ^ i);
        }

    pri(sz(ans));

    for (auto it : ans)
    {
        for (auto itr : it)
            cout << itr << " ";

        cout << endl;
    }
}

• Subtask 1: 110 / 110