Submission #463964

#	Time	Username	Problem	Language	Result	Execution time	Memory
463964		tengiz05	Game (eJOI20_game)	C++17	20 / 100	1091 ms	252 KiB

game

#include <bits/stdc++.h>

constexpr int N = 25;

char hor[N][N], ver[N][N];
bool vis[N][N];

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    
    int n, m;
    std::cin >> n >> m;
    
    for (int i = 0; i <= n; i++) {
        for (int j = 0; j < m; j++) {
            std::cin >> hor[i][j];
        }
    }
    
    for (int i = 0; i < n; i++) {
        for (int j = 0; j <= m; j++) {
            std::cin >> ver[i][j];
        }
    }
    
    std::vector<int> a;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (vis[i][j])
                continue;
            int Size = 0;
            std::queue<std::pair<int, int>> que;
            que.emplace(i, j);
            vis[i][j] = true;
            while (!que.empty()) {
                auto [x, y] = que.front();
                que.pop();
                Size++;
                // std::cout << x << " " << y << "\n";
                if (x > 0 && hor[x][y] == '0' && !vis[x - 1][y]) {
                    que.emplace(x - 1, y);
                    vis[x - 1][y] = true;
                }
                if (x + 1 < n && hor[x + 1][y] == '0' && !vis[x + 1][y]) {
                    que.emplace(x + 1, y);
                    vis[x + 1][y] = true;
                }
                
                if (y > 0 && ver[x][y] == '0' && !vis[x][y - 1]) {
                    que.emplace(x, y - 1);
                    vis[x][y - 1] = true;
                }
                if (y + 1 < m && ver[x][y + 1] == '0' && !vis[x][y + 1]) {
                    que.emplace(x, y + 1);
                    vis[x][y + 1] = true;
                }
            }
            if (Size == 1 && hor[i][j] == '1' && hor[i + 1][j] == '1' && ver[i][j] == '1' && ver[i][j + 1] == '1')
                continue;
            a.emplace_back(Size);
            // std::cout << Size << "\n";
        }
    }
    
    int k = a.size();
    int pw = 1;
    for (int i = 0; i < k; i++, pw *= 3);
    
    std::function<int(std::vector<int>)> calc = [&](std::vector<int> v) {
        int ans = -1e9;
        if (std::count(v.begin(), v.end(), 2) == k) {
            return 0;
        }
        for (int i = 0; i < k; i++) {
            if (v[i] == 0) {
                v[i] = 1;
                ans = std::max(ans, -calc(v));
                v[i] = 0;
            } else if (v[i] == 1) {
                v[i] = 2;
                ans = std::max(ans, a[i] + calc(v));
                v[i] = 1;
            }
        }
        return ans;
    };
    
    // std::cout << calc({1, 1, 0, 1, 0}) << "\n";
    
    std::cout << calc(std::vector<int>(k)) << "\n";
    
    return 0;
}


// 
// + 1

• Subtask 1: 20 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20