제출 #725974

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
725974		vjudge1	로봇 (APIO13_robots)	C++17	30 / 100	323 ms	96664 KiB

robots

#include <bits/stdc++.h>
using namespace std;

const int dr[] = {-1, 0, +1, 0};
const int dc[] = {0, +1, 0, -1};

enum {
        STAND = 4,
        UP = 0,
        RIGHT = 1,
        DOWN = 2,
        LEFT = 3,
        NOT_GOOD = 1000000000
};

int n, m, k;
char a[500][500];
int c[500][500];
int f[9][9][500][500];
int g[4][500][500];
vector<pair<int, int>> adj[500][500];

int DP(int z, int i, int j) {
        if (g[z][i][j] != -1) return g[z][i][j];
        g[z][i][j] = NOT_GOOD;
        int zz = (z + c[i][j]) % 4;
        int ii = i + dr[zz];
        int jj = j + dc[zz];
        if (ii < 0 || ii >= n || jj < 0 || jj >= m || a[ii][jj] == 'x') return g[z][i][j] = i * m + j;
        return g[z][i][j] = DP(zz, ii, jj);
}

int DP(int l, int r, int i, int j) {
        if (f[l][r][i][j] != -1) return f[l][r][i][j];
        f[l][r][i][j] = NOT_GOOD;
        for (int m = l; m < r; m++) f[l][r][i][j] = min(f[l][r][i][j], DP(l, m, i, j) + DP(m + 1, r, i, j));
        for (auto [ii, jj] : adj[i][j]) f[l][r][i][j] = min(f[l][r][i][j], DP(l, r, ii, jj) + 1);
        return f[l][r][i][j];
}

int main() {
        memset(f, -1, sizeof f);
        cin >> k >> m >> n;
        for (int i = 0; i < n; i++) cin >> a[i];
        for (int i = 0; i < n; i++) {
                for (int j = 0; j < m; j++) {
                        if (a[i][j] == 'A') {
                                c[i][j] = +3;
                        } else if (a[i][j] == 'C') {
                                c[i][j] = +1;
                        } else if (a[i][j] == 'x') {
                                c[i][j] = -1;
                        } else if (a[i][j] == '.') {
                                c[i][j] = 0;
                        } else {
                                a[i][j] -= '0' + 1;
                                assert(0 <= a[i][j] && a[i][j] < k);
                                f[a[i][j]][a[i][j]][i][j] = 0;
                        }
                }
        }

        memset(g, -1, sizeof g);
        for (int i = 0; i < n; i++) {
                for (int j = 0; j < m; j++) {
                        for (int z = 0; z < 4; z++) {
                                if (DP(z, i, j) == NOT_GOOD) continue;
                                int ii = DP(z, i, j) / m;
                                int jj = DP(z, i, j) % m;

                                adj[ii][jj].emplace_back(i, j);
                        }
                }
        }

        int res = NOT_GOOD;

        for (int i = 0; i < n; i++) {
                for (int j = 0; j < m; j++) {
                        res = min(res, DP(0, k - 1, i, j));
                }
        }

        cout << (res == NOT_GOOD ? -1 : res);
}

컴파일 시 표준 에러 (stderr) 메시지

robots.cpp: In function 'int main()':
robots.cpp:58:41: warning: array subscript has type 'char' [-Wchar-subscripts]
   58 |                                 f[a[i][j]][a[i][j]][i][j] = 0;
      |                                   ~~~~~~^
robots.cpp:58:50: warning: array subscript has type 'char' [-Wchar-subscripts]
   58 |                                 f[a[i][j]][a[i][j]][i][j] = 0;
      |                                            ~~~~~~^

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40