제출 #442295

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
442295		elazarkoren	Game (eJOI20_game)	C++17	0 / 100	1090 ms	13404 KiB

game

#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
#define x first
#define y second
#define all(v) v.begin(), v.end()
#define chkmin(a, b) a = min(a, b)
#define chkmax(a, b) a = max(a, b)
using namespace std;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> pii;
typedef vector<pii> vii;
typedef vector<bool> vb;
typedef vector<vb> vvb;

const int infinity = 1e9;

int n, m;

vvb hor_edge, ver_edge;

inline int Val(int i, int j) {
    return i + j * n;
}

inline bool Inside(int i, int j) {
    if (i < 0 || i >= n || j < 0 || j >= m) return false;
    return hor_edge[i][j] && hor_edge[i + 1][j] && ver_edge[i][j] && ver_edge[i][j + 1];
}

map<pair<vvb, vvb>, int> visited1;
map<pair<vvb, vvb>, int> visited2;

int Solve(bool player1) {
    if (player1) {
        auto it = visited1.find({hor_edge, ver_edge});
        if (it != visited1.end()) {
            return it->y;
        }
    } else {
        auto it = visited2.find({hor_edge, ver_edge});
        if (it != visited2.end()) {
            return it->y;
        }
    }
    int ans = player1 ? -infinity : infinity;
    for (int i = 0; i <= n; i++) {
        for (int j = 0; j < m; j++) {
            if (!hor_edge[i][j]) {
                hor_edge[i][j] = true;
                bool b1 = Inside(i, j);
                bool b2 = Inside(i - 1, j);
//                if (player1) s += b1 + b2;
//                else s -= b1 + b2;
                int val = Solve((b1 || b2) ? player1 : !player1);
                if (player1) {
//                    s -= b1 + b2;
                    chkmax(ans, val + b1 + b2);
                }
                else {
//                    s += b1 + b2;
                    chkmin(ans, val - b1 - b2);
                }
                hor_edge[i][j] = false;
            }
        }
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j <= m; j++) {
            if (!ver_edge[i][j]) {
                ver_edge[i][j] = true;
                bool b1 = Inside(i, j);
                bool b2 = Inside(i, j - 1);
//                if (player1) s += b1 + b2;
//                else s -= b1 + b2;
                int val = Solve((b1 || b2) ? player1 : !player1);
                if (player1) {
//                    s -= b1 + b2;
                    chkmax(ans, val + b1 + b2);
                }
                else {
//                    s += b1 + b2;
                    chkmin(ans, val - b1 - b2);
                }
                ver_edge[i][j] = false;
            }
        }
    }

    if (ans == -infinity || ans == infinity) {
        if (player1) {
            visited1[{hor_edge, ver_edge}] = 0;
        } else {
            visited2[{hor_edge, ver_edge}] = 0;
        }
        return 0;
    }
    if (player1) {
        visited1[{hor_edge, ver_edge}] = ans;
    } else {
        visited2[{hor_edge, ver_edge}] = ans;
    }
    return ans;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> m;
    hor_edge.resize(n + 1, vb(m)), ver_edge.resize(n, vb(m + 1));
    for (int i = 0; i <= n; i++) {
        for (int j = 0; j < m; j++) {
            char c;
            cin >> c;
            hor_edge[i][j] = c == '1';
        }
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j <= m; j++) {
            char c;
            cin >> c;
            ver_edge[i][j] = c == '1';
        }
    }
    cout << Solve(true);
    return 0;
}
//3 2
//11
//11
//01
//11
//000
//100
//100

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