Submission #219422

#	Time	Username	Problem	Language	Result	Execution time	Memory
219422		NONAME	Skandi (COCI20_skandi)	C++17	18 / 110	7 ms	512 KiB

Main

#include <bits/stdc++.h>
#include <time.h>
//#include <random>
//#ifndef _LOCAL
//#pragma GCC optimize("-O3")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
//#endif
#define sz(x) int(x.size())
#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)
#define N 2 * 100500
#define oo ll(1e16)
#define pii pair <int, int>
#define pll pair <ll, ll>
#define ft first
#define sd second
#define pb push_back
#define ppb pop_back
#define mp make_pair
#define el '\n'
#define elf endl
#define base ll(1e9 + 7)
#define re return
#define nins 4294967295
using namespace std;
typedef long long ll;
typedef long double ld;

//mt19937 rnd(0);

int n, m;
vector <pair <int, pii> > v;
char c[100][100];
bool mk[100][100];

bool ok(ll msk) {
    for (int i = 0; i < n; i++)
    for (int j = 0; j < m; j++)
        mk[i][j] = (c[i][j] == '1');

    for (ll i = 0; i < sz(v); i++) {
        if (!(msk & (1 << i)))
            continue;

        int x = v[i].sd.ft, y = v[i].sd.sd;

        if (v[i].ft == 2) {
            while (y < m && c[x][y] != '1') mk[x][y++] = 1;
        } else {
            while (x < n && c[x][y] != '1') mk[x++][y] = 1;
        }
    }

    for (int i = 0; i < n; i++)
    for (int j = 0; j < m; j++)
        if (!mk[i][j])
            return 0;

    return 1;
}

void solve() {
    cin >> n >> m;
    for (int i = 0; i < n; i++)
    for (int j = 0; j < m; j++)
        cin >> c[i][j];

    for (int i = 0; i < n; i++)
    for (int j = 0; j < m; j++) {
        if (c[i][j] == '1')
            continue;

        bool gd = ((i - 1 < 0) || (c[i - 1][j] == '1'));

        if (gd)
            v.pb({1, {i, j}});

        gd = ((j - 1 < 0) || (c[i][j - 1] == '1'));

        if (gd)
            v.pb({2, {i, j}});
    }

    ll ans = sz(v), p = -1;

    for (ll i = 1; i < (1ll << ll(sz(v))); i++)
        if (ok(i)) {
            if (__builtin_popcount(i) < ans) {
                ans = __builtin_popcount(i);
                p = i;
            }
        }

    cout << ans << el;
    for (ll i = 0; i < sz(v); i++) {
        if (!(p & (1ll << i)))
            continue;

        if (v[i].ft == 2) cout << v[i].sd.ft + 1 << ' ' << v[i].sd.sd << " DESNO";
            else cout << v[i].sd.ft << ' ' << v[i].sd.sd + 1 << " DOLJE";
        cout << el;
    }
}

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    #ifdef _LOCAL
        in("input.txt");

        int t = 1;
//        cin >> t;
        for (int i = 1; i <= t; i++) {
            cout << "Test #" << i << elf;

            clock_t start_time = clock();

            solve();

            cerr.precision(4); cerr << fixed;
            cerr << elf;
            cerr << "Time :: " << ld(clock() - start_time) / CLOCKS_PER_SEC << elf;

            cout << elf;
        }
    #else
        int t = 1;
//        cin >> t;

        while (t--) {
            solve();
            cout << el;
        }
    #endif
}

• Subtask 1: 18 / 18
• Subtask 2: 0 / 32
• Subtask 3: 0 / 60