oj.uz

답안 #509967

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
509967 2022-01-14T12:56:12 Z blue 로봇 (APIO13_robots) C++17
60 / 100
 418 ms 163844 KB 
#include <iostream>
#include <algorithm>
#include <set>
#include <queue>
#include <vector>
using namespace std;

using vi = vector<int>;
using ll = long long;
using vll = vector<ll>;
using pii = pair<int, int>;
using vvi = vector<vi>;

const int fr = 0;
const int lt = 3;
const int rt = 1;
const int bl = 2;

int n, h, w;

int mov[5];

// const int tm

vvi edge;
vvi rev_edge;

void add_edge(int u, int v)
{
    edge[u].push_back(v);
    rev_edge[v].push_back(u);
}





const int INF = 10'000'000;

vi occ[500*500*4];
vi* act_edge;

void bfs(vi& dst, int mxd)
{
    // cerr <<"bfs called\n";
    // bool flg = (mxd==0);
    queue<int> tbv;
    for(int d = 0; d <= mxd; d++)
    {
        // cerr << "d = " << d << ", mxd = " << mxd << '\n';
        for(int o: occ[d])
        {
            // cerr << "o = " << o << '\n';
            if(dst[o] != d) continue;
            tbv.push(o);
        }
        // cerr << "chk\n";

        while((!tbv.empty()) && dst[tbv.front()] == d)
        {
            int u = tbv.front();
            tbv.pop();

            for(int v: act_edge[u])
            {
                if(dst[v] <= dst[u] + 1) continue;
                dst[v] = dst[u] + 1;
                tbv.push(v);
                mxd = max(mxd, dst[v]);
            }
        }
    }
}









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

    cin >> n >> w >> h;

    vi state((h+2)*(w+2), bl);

    int loc[n];

    vi actual_ind((h+2)*(w+2), -1);
    int ai = 0;
    // vi ai;

    for(int r = 1; r <= h; r++)
    {
        for(int c = 1; c <= w; c++)
        {
            int i = (w+2)*r+c;

            char z;
            cin >> z;

            if('1' <= z && z <= '9')
            {
                loc[z-'1'] = i;
                state[i] = fr;
            }
            else if(z == '.')
            {
                state[i] = fr;
            }
            else if(z == 'A')
            {
                state[i] = lt;
            }
            else if(z == 'C')
            {
                state[i] = rt;
            }
            else if(z == 'x')
            {
                state[i] = bl;
            }
        }
    }

    mov[0] = -(w+2); //0 = top
    mov[1] = +1; //1 = right
    mov[2] = +(w+2); //2 = down
    mov[3] = -1; //3 = left
    mov[4] = 0;

    // vi edge[5*(h+2)*(w+2)];
    // vi in_edgd
    edge = vvi(5*(h+2)*(w+2));
    rev_edge = vvi(5*(h+2)*(w+2));

    vi dest(5*(h+2)*(w+2), -1);
    queue<int> tbv;

    for(int r = 1; r <= h; r++)
    {
        for(int c = 1; c <= w; c++)
        {
            int i = (w+2)*r + c;

            if(state[i] == bl) continue;

            ai++;
            actual_ind[i] = ai-1;

            // cerr << r << ' ' << c << '\n';

            for(int dir = 0; dir <= 3; dir++)
            {
                // cerr << "   " << dir << '\n';
                add_edge(5*i + 4, 5*i + dir);
                // cerr << "A\n";
                if(state[i + mov[dir]] != bl)
                {
                    // cerr << "B\n";
                    add_edge(5*i + dir, 5*(i + mov[dir]) + (dir + state[i + mov[dir]])%4);
                    // cerr << "C\n";
                }
                else
                {
                    // cerr << "D\n";
                    add_edge(5*i + dir, 5*i + 4);
                    dest[5*i + dir] = i;
                    tbv.push(5*i + dir);
                    // cerr << "E\n";
                }
            }
        }
    }
    // cerr << "A\n";



    while(!tbv.empty())
    {
        int u = tbv.front();
        tbv.pop();
        for(int v: rev_edge[u])
        {
            if(v % 5 == 4) continue;
            if(dest[v] != -1) continue;
            dest[v] = dest[u];
            tbv.push(v);
        }
    }


    act_edge = new vi[(h+2)*(w+2)];
    for(int r = 1; r <= h; r++)
    {
        for(int c = 1; c <= w; c++)
        {
            int ind = (w+2)*r + c;

            for(int q = 0; q < 4; q++)
            {
                if(dest[5*ind + q] ==  -1 || dest[5*ind+q] == ind) continue;
                act_edge[ind].push_back(dest[5*ind+q]);
            }

            // cerr << "current cell = " << r << ' ' << c << " : ";
            // for(int a: act_edge[ind]) cerr << a/(w+2) << " " << a%(w+2) << " | ";
            // cerr << '\n';
        }
    }

    // for(int f = )
    edge.clear();
    rev_edge.clear();
    dest.clear();
    state.clear();

















    vi dp[n][n];
    for(int i = 0; i < n; i++)
    {
        occ[0].push_back(loc[i]);
        dp[i][i] = vi((h+2)*(w+2), INF);
        dp[i][i][loc[i]] = 0;
        bfs(dp[i][i], 0);
        occ[0].pop_back();

        // cerr << "\n\n\n";
        // cerr << "robot = " << i+1 << '\n';
        // for(int l = 0; l < (h+2)*(w+2); l++)
        // {
        //     if(dp[i][i][l] >= INF) continue;
        //     // cerr << l/(w+2) << ' ' << l%(w+2) << " : " << dp[i][i][l] << '\n';
        // }
    }

    for(int d = 1; d < n; d++)
    {
        for(int i = 0; i+d < n; i++)
        {
            int j = i+d;
            // cerr << "\n\n\n computing dp " << i << ' ' << j << '\n';

            dp[i][j] = vi((h+2)*(w+2), INF);

            for(int k = i; k < j; k++)
            {
                for(int x = 0; x < (h+2)*(w+2); x++)
                {
                    dp[i][j][x] = min(dp[i][j][x], dp[i][k][x] + dp[k+1][j][x]);
                }
            }

            vi elim;

            for(int u = 0; u < (h+2)*(w+2); u++)
                if(dp[i][j][u] < INF) //add constraint on bfs here?
                {
                    occ[dp[i][j][u]].push_back(u);
                    elim.push_back(dp[i][j][u]);
                }

            bfs(dp[i][j], d*h*w);

            for(int e: elim) occ[e].clear();
        }
    }

    int final_ans = INF;

    for(int u = 0; u < (h+2)*(w+2); u++)
    {
        final_ans = min(final_ans, dp[0][n-1][u]);
    }

    if(final_ans >= INF) final_ans = -1;
    cout << final_ans << '\n';
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23756 KB Output is correct
2 Correct 12 ms 23756 KB Output is correct
3 Correct 11 ms 23756 KB Output is correct
4 Correct 11 ms 23756 KB Output is correct
5 Correct 13 ms 23744 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23756 KB Output is correct
2 Correct 12 ms 23756 KB Output is correct
3 Correct 11 ms 23756 KB Output is correct
4 Correct 11 ms 23756 KB Output is correct
5 Correct 13 ms 23744 KB Output is correct
6 Correct 11 ms 23756 KB Output is correct
7 Correct 14 ms 23688 KB Output is correct
8 Correct 14 ms 23884 KB Output is correct
9 Correct 12 ms 23756 KB Output is correct
10 Correct 11 ms 23756 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23756 KB Output is correct
2 Correct 12 ms 23756 KB Output is correct
3 Correct 11 ms 23756 KB Output is correct
4 Correct 11 ms 23756 KB Output is correct
5 Correct 13 ms 23744 KB Output is correct
6 Correct 11 ms 23756 KB Output is correct
7 Correct 14 ms 23688 KB Output is correct
8 Correct 14 ms 23884 KB Output is correct
9 Correct 12 ms 23756 KB Output is correct
10 Correct 11 ms 23756 KB Output is correct
11 Correct 154 ms 81160 KB Output is correct
12 Correct 74 ms 64580 KB Output is correct
13 Correct 101 ms 75516 KB Output is correct
14 Correct 205 ms 80472 KB Output is correct
15 Correct 138 ms 80312 KB Output is correct

Subtask #4
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23756 KB Output is correct
2 Correct 12 ms 23756 KB Output is correct
3 Correct 11 ms 23756 KB Output is correct
4 Correct 11 ms 23756 KB Output is correct
5 Correct 13 ms 23744 KB Output is correct
6 Correct 11 ms 23756 KB Output is correct
7 Correct 14 ms 23688 KB Output is correct
8 Correct 14 ms 23884 KB Output is correct
9 Correct 12 ms 23756 KB Output is correct
10 Correct 11 ms 23756 KB Output is correct
11 Correct 154 ms 81160 KB Output is correct
12 Correct 74 ms 64580 KB Output is correct
13 Correct 101 ms 75516 KB Output is correct
14 Correct 205 ms 80472 KB Output is correct
15 Correct 138 ms 80312 KB Output is correct
16 Runtime error 418 ms 163844 KB Execution killed with signal 9
17 Halted 0 ms 0 KB -