Submission #377564

#TimeUsernameProblemLanguageResultExecution timeMemory
377564VimmerSateliti (COCI20_satellti)C++14
50 / 110
2779 ms147020 KiB
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

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

#define N 1001
#define NN 1005000
#define PB push_back
#define M ll(1e9 + 7)
#define all(x) x.begin(), x.end()
#define sz(x) int(x.size())
#define pri(x) cout << x << endl
#define endl '\n'
#define _ << " " <<
#define F first
#define S second

using namespace std;
//using namespace __gnu_pbds;

//typedef tree <int, null_type, less <int>, rb_tree_tag, tree_order_statistics_node_update> oredered_set;

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef short int si;

bitset <N> bt[N][N], nl, cur, cp;

vector <pair <int, int> > vr;

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

//    freopen("1.in", "r", stdin);

    int n, m;

    cin >> n >> m;

    string s[n];

    for (int i = 0; i < n; i++)
        cin >> s[i];

    bool ft = 1;

    int kl = 0;

    for (int i = 0; i < n; i++)
        for (int j = 0; j < m; j++)
        {
            if (s[i][j] == '*')
                {
                    bt[i][0][j] = 1;

                    ft = 0;

                    kl++;
                }
        }

    if (ft || kl == n * m)
    {
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
                cout << s[i][j];

            cout << endl;
        }

        exit(0);
    }

    for (int i = 0; i < n; i++)
        for (int u = 1; u < m; u++)
        {
            bt[i][u] = bt[i][u - 1];

            bt[i][u] >>= 1;

            if (s[i][u - 1] == '*')
                bt[i][u][m - 1] = 1;
        }

//    if (n > 300 || m > 300)
//        exit(0);

    for (int i = 0; i < n; i++)
        for (int j = 0; j < m; j++)
            vr.PB({i, j});

    bool fr = 0;

    if (n > 300 || m > 300)
        fr = 1;

    vector <pair <int, int> > nx; nx.clear();

    int u = 0;

    int val = 0;

    while (sz(vr) > 1 && u < n && (val <= int(5 * 1e7) || !fr))
    {
        val += sz(vr);

        nx.clear();

        nx.PB(vr[0]);

        cur = bt[(vr[0].F + u) % n][vr[0].S];

//        cur >>= (vr[0].S);

        for (int t = 1; t < sz(vr); t++)
        {
            nl = bt[(vr[t].F + u) % n][vr[t].S];

//            nl >>= (vr[t].S);

            cp = (nl ^ cur);

            int ps = cp._Find_next(-1);

            if (ps == N)
            {
                nx.PB(vr[t]);
            }
            else if (cur[ps] == 0)
            {
                nx.clear();

                nx.PB(vr[t]);

                cur = nl;
            }
        }

        u++;

        vr = nx;
    }

    int x = vr[0].F, y = vr[0].S;

    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < m; j++)
            cout << s[(x + i) % n][(y + j) % m];

        cout << endl;
    }
}
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