Submission #660658

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
660658	2022-11-22T17:58:07 Z	USER	Robots (APIO13_robots)	C++14	Compilation error	0 ms	0 KB

robots

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

typedef pair <int, int> pr;
int k, n, m, a[501][501][9][9];
char c[501][501];

const int inf = 1000000000;
pr go[4][501][501];

struct nod{
    int i, j;
    unsigned l, r;

    bool operator < (const nod& aux) const
    {
        return a[i][j][l][r] > a[aux.i][aux.j][aux.l][aux.r];
    }
};

queue <nod> Q;

void afis(pr aux)
{
    cout << aux.first << ' ' << aux.second << '\n';
}

// 0 - Up, 1 - Left, 2 - Down, 3 - Right

int d1[] = { -1, 0, 1, 0 };
int d2[] = { 0, 1, 0, -1 };

inline bool in(int i, int j)
{
    return i >= 1 && i <= n && j >= 1 && j <= m;
}

inline void prev(int& dir)
{
    dir--;
    if (dir == -1)
        dir = 3;
}

inline void next(int& dir)
{
    dir++;
    if (dir == 4)
        dir = 0;
}

pr get(int dir, int i, int j)
{
    if (!in(i, j) || c[i][j] == 'x')
    {
        next(dir);
        next(dir);
        return { i + d1[dir], j + d2[dir] };
    }

    if (go[dir][i][j].first)
        return go[dir][i][j];

    int nxDir = dir;

    if (c[i][j] == 'A')
        prev(nxDir);
    else if (c[i][j] == 'C')
        next(nxDir);

    pr aux = get(nxDir, i + d1[nxDir], j + d2[nxDir]);
    go[dir][i][j] = aux;
    return aux;
}

inline bool digit(char c)
{
    return c >= '0' && c <= '9';
}

bool update(pr p, int val, int l, int r)
{
    if (a[p.first][p.second][l][r] > val)
    {
        a[p.first][p.second][l][r] = val;
        return 1;
    }

    return 0;
}

void lee()
{
    int l, r, i, j, x, y;

    while (!Q.empty())
    {
        i = Q.front().i;
        j = Q.front().j;
        l = Q.front().l;
        r = Q.front().r;
        Q.pop();

        for (int p = 0; p <= 3; p++)
        {
            x = go[p][i][j].first;
            y = go[p][i][j].second;

            if (update({ x, y }, a[i][j][l][r] + 1, l, r))
                Q.push({ x, y, unsigned(l), unsigned(r)});
        }
    }
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    fin >> k >> m >> n;

    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
        {
            for (int l = 0; l < k; l++)
                for (int p = 0; p < k; p++)
                    a[i][j][l][p] = inf;

            fin >> c[i][j];
            if (isdigit(c[i][j]))
                c[i][j]--;
        }

    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
            for (int l = 0; l <= 3; l++)
                get(l, i, j);

    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
            if (digit(c[i][j]))
            {
                int aux = (c[i][j] - '0');
                update({ i, j }, 0, aux, aux);
                Q.push({ i, j, unsigned(aux), unsigned(aux) });
                lee();
            }

    for (int l = 2; l <= k; l++)
        for (int p = 0; p < k - l + 1; p++)
        {
            int q = p + l - 1;
            
            for (int i = 1; i <= n; i++)
                for (int j = 1; j <= m; j++)
                {
                    for (int t = p; t < q; t++)
                        update({ i, j }, a[i][j][p][t] + a[i][j][t + 1][q], p, q);

                    Q.push({ i, j, unsigned(p), unsigned(q)});
                }

            lee();
        }

    int mini = inf;

    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
            mini = min(mini, a[i][j][0][k - 1]);

    if (mini == inf)
        cout << -1;
    else
        cout << mini;

    return 0;
}

Compilation message

robots.cpp: In function 'int main()':
robots.cpp:119:5: error: 'fin' was not declared in this scope; did you mean 'in'?
  119 |     fin >> k >> m >> n;
      |     ^~~
      |     in