oj.uz

Submission #422316

# Submission time Handle Problem Language Result Execution time Memory
422316 2021-06-10T02:56:07 Z SirCovidThe19th Robots (APIO13_robots) C++14
60 / 100
 1500 ms 97604 KB 
#include <bits/stdc++.h>
using namespace std;

#define FOR(i, x, y) for (int i = x; i < y; i++)

const int mx = 500;

int n, w, h, ans = 505*505, dp[mx][mx][9][9], di[4] = {-1, 0, 1, 0}, dj[4] = {0, 1, 0, -1}; 
char grid[mx][mx]; pair<int, int> pos[4][mx][mx]; list<pair<int, int>> trav[mx*mx];

pair<int, int> nextPos(int i, int j, int d){
    int old = d; d = (d-(grid[i][j] == 'A')+(grid[i][j] == 'C')+4)%4;
    int r = i+di[d], c = j+dj[d]; pos[old][i][j] = {-2, -2}; pair<int, int> ret;
    if (!(r < h and r >= 0 and c < w and c >= 0 and grid[r][c] != 'x')) ret = {i, j};
    else if (pos[d][r][c] != make_pair(-1, -1)) ret = pos[d][r][c];
    else ret = nextPos(r, c, d);
    return pos[old][i][j] = ret;
}

int main(){
    cin >> n >> w >> h; memset(dp, 0x3f, sizeof(dp));
    FOR(i, 0, h) FOR(j, 0, w) { cin >> grid[i][j]; if (isdigit(grid[i][j])) dp[i][j][grid[i][j]-'1'][grid[i][j]-'1'] = 0; }
    FOR(i, 0, h) FOR(j, 0, w) FOR(d, 0, 4) pos[d][i][j] = {-1, -1};
    FOR(i, 0, h) FOR(j, 0, w) FOR(d, 0, 4) if (grid[i][j] != 'x') nextPos(i, j, d);
    FOR(l, 0, n){
        FOR(x, 0, n-l){
            int y = x+l; 
            FOR(i, 0, h) FOR(j, 0, w) if (grid[i][j] != 'x')
                FOR(mid, x, y)
                    dp[i][j][x][y] = min(dp[i][j][x][y], dp[i][j][x][mid]+dp[i][j][mid+1][y]);
            FOR(i, 0, h) FOR(j, 0, w) if (dp[i][j][x][y] < w*h) trav[dp[i][j][x][y]].push_back({i, j});
            FOR(i, 0, w*h){
                while (!trav[i].empty()){
                    int r, c; tie(r, c) = trav[i].front(); trav[i].pop_front();
                    FOR(d, 0, 4){
                        int r1, c1; tie(r1, c1) = pos[d][r][c]; 
                        if (r1 < 0 or c1 < 0) continue;
                        if (dp[r][c][x][y]+1 < dp[r1][c1][x][y]){
                            dp[r1][c1][x][y] = dp[r][c][x][y]+1;
                            trav[dp[r1][c1][x][y]].push_back({r1, c1});
                        }
                    }
                }
            }
        }
    }
    FOR(i, 0, h) FOR(j, 0, w) ans = min(ans, dp[i][j][0][n-1]);
    cout<<((ans > w*h) ? -1 : ans);
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 85444 KB Output is correct
2 Correct 38 ms 85400 KB Output is correct
3 Correct 37 ms 85328 KB Output is correct
4 Correct 36 ms 85600 KB Output is correct
5 Correct 36 ms 85564 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 85444 KB Output is correct
2 Correct 38 ms 85400 KB Output is correct
3 Correct 37 ms 85328 KB Output is correct
4 Correct 36 ms 85600 KB Output is correct
5 Correct 36 ms 85564 KB Output is correct
6 Correct 36 ms 85400 KB Output is correct
7 Correct 37 ms 85444 KB Output is correct
8 Correct 36 ms 85364 KB Output is correct
9 Correct 36 ms 85340 KB Output is correct
10 Correct 37 ms 85592 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 85444 KB Output is correct
2 Correct 38 ms 85400 KB Output is correct
3 Correct 37 ms 85328 KB Output is correct
4 Correct 36 ms 85600 KB Output is correct
5 Correct 36 ms 85564 KB Output is correct
6 Correct 36 ms 85400 KB Output is correct
7 Correct 37 ms 85444 KB Output is correct
8 Correct 36 ms 85364 KB Output is correct
9 Correct 36 ms 85340 KB Output is correct
10 Correct 37 ms 85592 KB Output is correct
11 Correct 231 ms 91332 KB Output is correct
12 Correct 51 ms 90308 KB Output is correct
13 Correct 111 ms 90308 KB Output is correct
14 Correct 566 ms 91584 KB Output is correct
15 Correct 183 ms 90940 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 85444 KB Output is correct
2 Correct 38 ms 85400 KB Output is correct
3 Correct 37 ms 85328 KB Output is correct
4 Correct 36 ms 85600 KB Output is correct
5 Correct 36 ms 85564 KB Output is correct
6 Correct 36 ms 85400 KB Output is correct
7 Correct 37 ms 85444 KB Output is correct
8 Correct 36 ms 85364 KB Output is correct
9 Correct 36 ms 85340 KB Output is correct
10 Correct 37 ms 85592 KB Output is correct
11 Correct 231 ms 91332 KB Output is correct
12 Correct 51 ms 90308 KB Output is correct
13 Correct 111 ms 90308 KB Output is correct
14 Correct 566 ms 91584 KB Output is correct
15 Correct 183 ms 90940 KB Output is correct
16 Correct 447 ms 93772 KB Output is correct
17 Execution timed out 1584 ms 97604 KB Time limit exceeded
18 Halted 0 ms 0 KB -