Submission #219398

#	Time	Username	Problem	Language	Result	Execution time	Memory
219398		VEGAnn	Skandi (COCI20_skandi)	C++14	9 / 110	6 ms	768 KiB

Main

#include <bits/stdc++.h>
#define all(x) x.begin(),x.end()
#define sz(x) ((int)x.size())
#define PB push_back
#define pii pair<int,int>
#define MP make_pair
#define ft first
#define sd second
using namespace std;
const int N = 510;
const int K = 1520;
const int oo = 2e9;
const int md = int(1e9) + 7;
vector<pii> vc;
char c[N][N], cc[N][N];
int n, m, ans = oo, mem;

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

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

    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] == '0') continue;

        if (i < n - 1 && c[i + 1][j] == '0')
            vc.PB(MP(i * m + j, 0));

        if (j < m - 1 && c[i][j + 1] == '0')
            vc.PB(MP(i * m + j, 1));
    }

    for (int msk = 0; msk < (1 << sz(vc)); msk++){
        int kol = __builtin_popcount(msk);

        if (kol >= ans) continue;

        for (int i = 0; i < n; i++)
        for (int j = 0; j < m; j++)
            cc[i][j] = c[i][j];

        for (int id = 0; id < sz(vc); id++)
            if (msk & (1 << id)){
                int x = vc[id].ft / m;
                int y = vc[id].ft % m;

                if (vc[id].sd){
                    int yy = y + 1;

                    while (yy < m && c[x][yy] == '0'){
                        cc[x][yy] = '1';
                        yy++;
                    }
                } else {
                    int xx = x + 1;

                    while (xx < n && c[xx][y] == '0'){
                        cc[xx][y] = '1';
                        xx++;
                    }
                }
            }

        bool ok = 1;

        for (int i = 0; i < n && ok; i++)
            for (int j = 0; j < m && ok; j++)
                if (cc[i][j] == '0')
                    ok = 0;

        if (ok && ans > kol){
            ans = kol;
            mem = msk;
        }
    }

    cout << ans << '\n';
    return 0;
}

• Subtask 1: 9 / 18
• Subtask 2: 0 / 32
• Subtask 3: 0 / 60