Submission #529656

#	Time	Username	Problem	Language	Result	Execution time	Memory
529656		topovik	Hiperkocka (COCI21_hiperkocka)	C++14	0 / 110	1083 ms	60936 KiB

Main

#include <bits/stdc++.h>
#define pb push_back
#define f first
#define s second

using namespace std;

typedef long long ll;
typedef long double ld;

const ll oo = 1e18 + 7;

const int N = 5e5 + 10;
const int M = 5000;
const int M1 = 1e6;

int n;
map <int, bool> mrk[N];
vector <int> a[N];
vector <int> ans;
vector <vector <int> > ans1;
vector <pair<int, int> > vc;
bool g = 1;

bool check(int x)
{
    for (int i = 0; i < n; i++)
        if (x == (1 << i)) return 1;
    return 0;
}

void Rec(int x, int y, int prv)
{
    ans1.back()[y] = x;
    for (auto i : a[y])
        if (i != prv)
    {
        int j;
        for (j = 0; j < (1 << n); (j == 0 ? j++ : j <<= 1))
            if (!mrk[min(x, j ^ x)][max(j ^ x, x)] && (j ^ x) != x)
        {
            mrk[min(x, j ^ x)][max(j ^ x, x)] = 1;
            vc.pb({min(x, j ^ x), max(j ^ x, x)});
            Rec(j ^ x, i, y);
            break;
        }
        g &= (j != (1 << n));
    }
}

int main()
{
    ios_base::sync_with_stdio(0);
    iostream::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    srand(time(NULL));
    cin >> n;
    for (int i = 0; i < n; i++)
    {
        int x, y;
        cin >> x >> y;
        a[x].pb(y);
        a[y].pb(x);
    }
    while (1)
    {
        bool g1 = 0;
        for (int i = 0; i <= n; i++)
        {
            ans1.pb({});
            ans1.back().resize(n + 1);
            vc.clear();
            g = 1;
            Rec(i, 0, 0);
            if (g)
            {
                g1 = 1;
                break;
            }
            ans1.pop_back();
            for (auto j : vc) mrk[j.f][j.s] = 0;
        }
        if (!g1) break;
    }

    int k = ans1.size();
    for (int x1 = 0; x1 < M; x1++)
    {
        int x = rand() % (1 << n);
        for (int ps = 0; ps < k; ps++)
        {
            bool g = 1;
            for (int i = 0; i <= n; i++)
                for (auto j : a[i]) g &= !mrk[min(ans1[ps][i] ^ x, ans1[ps][j] ^ x)][max(ans1[ps][i] ^ x, ans1[ps][j] ^ x)];
            if (g)
            {
                ans1.pb(ans1[ps]);
                for (int i = 0; i <= n; i++) ans1.back()[i] ^= x;
                for (int i = 0; i <= n; i++)
                    for (auto j : a[i]) mrk[min(ans1.back()[i], ans1.back()[j])][max(ans1.back()[i], ans1.back()[j])] = 1;
            }
        }
    }
    cout << ans1.size() << endl;
    for (auto i : ans1)
    {
        for (auto j : i) cout << j << " ";
        cout << endl;
    }
}
/*
5 3
2 1 1 2 2 3
2 3 3 4 4 5
4 1 1 2 2 3 3 4 4 5
*/

• Subtask 1: 0 / 110