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Submission #543658

# Submission time Handle Problem Language Result Execution time Memory
543658 2022-03-31T07:55:59 Z tudor Awesome Arrowland Adventure (eJOI19_adventure) C++17
100 / 100
 95 ms 22280 KB 
#include <iostream>
#include <queue>
#include <vector>
using namespace std;
const int nmax = 500;
const int dir = 4;
const int inf = 1e9;
int n, m;
char a[nmax + 2][nmax + 2];
int dl[dir] = { -1, 0, 1,  0 };
int dc[dir] = {  0, 1, 0, -1 };
int cod[128];
int dist[nmax * nmax + 1];
int vis[nmax * nmax + 1];
vector < pair < int, int > > g[nmax * nmax + 1];
void dijkstra ( int start ) {
    priority_queue < pair < int, int > > pq;
    for ( int i = 0; i < n * m; i++ )
        dist[i] = inf;
    dist[0] = 0;
    pq.push ( { 0, start } );
    while ( ! pq.empty() ) {
        int node = pq.top ().second;
        pq.pop ();
        if ( vis[node] == false ) {
            vis[node] = true;
            for ( auto x: g[node] )
                if ( dist[node] + x.second < dist[x.first] ) {
                    dist[x.first] = dist[node] + x.second;
                    pq.push ( { -dist[x.first], x.first } );
                }
        }
    }
}

static inline void add ( int x, int y, int d ) {
    if ( 0 <= x && x < n * m && 0 <= y && y < n * m )
        g[x].push_back ( { y, d } );
}
static inline int lin ( int x, int y ) {
    if ( x < 0 || x >= n || y < 0 || y >= m )
        return -1;
    return x * m + y;
}
int vec[4];
int main () {
    cin >> n >> m;
    for ( int i = 0; i < n; i++ )
        cin >> a[i];
    cod['N'] = 0; cod['E'] = 1; cod['S'] = 2; cod['W'] = 3;
    cod['X'] = -1;
    for ( int i = 0; i < n; i++ )
        for ( int j = 0; j < m; j++ )
            if ( a[i][j] != 'X' ) {
                int curr = lin ( i, j ), x;
                for ( int d = 0; d < dir; d++ )
                    vec[d] = lin ( i + dl[d], j + dc[d] );
                for ( int k = 0; k < 4; k++ )
                    if ( ( x = vec[( cod[a[i][j]] + k ) % dir] ) != -1 )
                        add ( curr, x , k );
            }
    dijkstra ( 0 );
    int r = dist[lin ( n - 1, m - 1 )];
    cout << ( r == inf? -1 : r );

    return 0;
}

Compilation message

adventure.cpp: In function 'int main()':
adventure.cpp:59:48: warning: array subscript has type 'char' [-Wchar-subscripts]
   59 |                     if ( ( x = vec[( cod[a[i][j]] + k ) % dir] ) != -1 )
      |                                          ~~~~~~^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6100 KB Output is correct
2 Correct 3 ms 6100 KB Output is correct
3 Correct 3 ms 6100 KB Output is correct
4 Correct 3 ms 6100 KB Output is correct
5 Correct 3 ms 6100 KB Output is correct
6 Correct 3 ms 6100 KB Output is correct
7 Correct 3 ms 6100 KB Output is correct
8 Correct 3 ms 6100 KB Output is correct
9 Correct 3 ms 6100 KB Output is correct
10 Correct 3 ms 6100 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6100 KB Output is correct
2 Correct 3 ms 6100 KB Output is correct
3 Correct 3 ms 6100 KB Output is correct
4 Correct 3 ms 6100 KB Output is correct
5 Correct 3 ms 6100 KB Output is correct
6 Correct 3 ms 6100 KB Output is correct
7 Correct 3 ms 6100 KB Output is correct
8 Correct 3 ms 6100 KB Output is correct
9 Correct 3 ms 6100 KB Output is correct
10 Correct 3 ms 6100 KB Output is correct
11 Correct 3 ms 6100 KB Output is correct
12 Correct 3 ms 6100 KB Output is correct
13 Correct 3 ms 6100 KB Output is correct
14 Correct 3 ms 6100 KB Output is correct
15 Correct 4 ms 6100 KB Output is correct
16 Correct 3 ms 6100 KB Output is correct
17 Correct 3 ms 6100 KB Output is correct
18 Correct 3 ms 6100 KB Output is correct
19 Correct 3 ms 6100 KB Output is correct
20 Correct 4 ms 6100 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6100 KB Output is correct
2 Correct 3 ms 6100 KB Output is correct
3 Correct 3 ms 6132 KB Output is correct
4 Correct 3 ms 6100 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6100 KB Output is correct
2 Correct 3 ms 6100 KB Output is correct
3 Correct 3 ms 6100 KB Output is correct
4 Correct 3 ms 6100 KB Output is correct
5 Correct 3 ms 6228 KB Output is correct
6 Correct 4 ms 6228 KB Output is correct
7 Correct 3 ms 6100 KB Output is correct
8 Correct 3 ms 6100 KB Output is correct
9 Correct 3 ms 6100 KB Output is correct
10 Correct 3 ms 6180 KB Output is correct

Subtask #5
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6100 KB Output is correct
2 Correct 3 ms 6100 KB Output is correct
3 Correct 3 ms 6100 KB Output is correct
4 Correct 3 ms 6100 KB Output is correct
5 Correct 3 ms 6100 KB Output is correct
6 Correct 3 ms 6100 KB Output is correct
7 Correct 3 ms 6100 KB Output is correct
8 Correct 3 ms 6100 KB Output is correct
9 Correct 3 ms 6100 KB Output is correct
10 Correct 3 ms 6100 KB Output is correct
11 Correct 3 ms 6100 KB Output is correct
12 Correct 3 ms 6100 KB Output is correct
13 Correct 3 ms 6100 KB Output is correct
14 Correct 3 ms 6100 KB Output is correct
15 Correct 4 ms 6100 KB Output is correct
16 Correct 3 ms 6100 KB Output is correct
17 Correct 3 ms 6100 KB Output is correct
18 Correct 3 ms 6100 KB Output is correct
19 Correct 3 ms 6100 KB Output is correct
20 Correct 4 ms 6100 KB Output is correct
21 Correct 3 ms 6100 KB Output is correct
22 Correct 3 ms 6100 KB Output is correct
23 Correct 3 ms 6132 KB Output is correct
24 Correct 3 ms 6100 KB Output is correct
25 Correct 3 ms 6100 KB Output is correct
26 Correct 3 ms 6100 KB Output is correct
27 Correct 3 ms 6100 KB Output is correct
28 Correct 3 ms 6100 KB Output is correct
29 Correct 3 ms 6228 KB Output is correct
30 Correct 4 ms 6228 KB Output is correct
31 Correct 3 ms 6100 KB Output is correct
32 Correct 3 ms 6100 KB Output is correct
33 Correct 3 ms 6100 KB Output is correct
34 Correct 3 ms 6180 KB Output is correct
35 Correct 10 ms 7216 KB Output is correct
36 Correct 5 ms 6228 KB Output is correct
37 Correct 11 ms 7380 KB Output is correct
38 Correct 10 ms 8020 KB Output is correct
39 Correct 78 ms 17964 KB Output is correct
40 Correct 87 ms 18012 KB Output is correct
41 Correct 38 ms 16972 KB Output is correct
42 Correct 76 ms 18008 KB Output is correct
43 Correct 95 ms 22280 KB Output is correct
44 Correct 36 ms 16972 KB Output is correct