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Submission #464418

# Submission time Handle Problem Language Result Execution time Memory
464418 2021-08-13T07:38:44 Z Tenis0206 Awesome Arrowland Adventure (eJOI19_adventure) C++11
100 / 100
 68 ms 5920 KB 
#include <bits/stdc++.h>

using namespace std;
const int oo = INT_MAX;
int dx[] = {0,0,1,0,-1};
int dy[] = {0,1,0,-1,0};
int n,m,c[505][505];
priority_queue<pair<int,pair<int,int>>,vector<pair<int,pair<int,int>>>, greater<pair<int,pair<int,int>>>> h;
bool sel[505][505];
int d[505][505];
void Dijkstra(int x, int y)
{
    for(int i=1; i<=n; i++)
    {
        for(int j=1; j<=m; j++)
        {
            d[i][j] = oo;
        }
    }
    d[1][1] = 0;
    if(c[x][y])
    {
        h.push({0,{x,y}});
    }
    int cnt = 0;
    while(!h.empty())
    {
        while(!h.empty() && sel[h.top().second.first][h.top().second.second])
        {
            h.pop();
        }
        if(h.empty())
        {
            break;
        }
        int k = h.top().first;
        int x = h.top().second.first;
        int y = h.top().second.second;
        h.pop();
        sel[x][y] = true;
        for(int p=1; p<=4; p++)
        {
            int xx = x + dx[p];
            int yy = y + dy[p];
            if(xx==1 && yy==1)
            {
                continue;
            }
            if(xx<1 || yy<1 || xx>n || yy>m)
            {
                continue;
            }
            int cost = 0;
            if(p>=c[x][y])
            {
                cost = p-c[x][y];
            }
            else
            {
                cost = 4-c[x][y]+p;
            }
            if(xx==n && yy==m)
            {
                ++cnt;
            }
            if(d[x][y]+cost<=d[xx][yy])
            {
                d[xx][yy] = d[x][y]+cost;
                if(c[xx][yy])
                {
                    h.push({d[xx][yy],{xx,yy}});
                }
            }
            if(cnt==2)
            {
                return;
            }
        }
    }
}
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin>>n>>m;
    for(int i=1; i<=n; i++)
    {
        for(int j=1; j<=m; j++)
        {
            char ch;
            cin>>ch;
            if(ch=='E')
            {
                c[i][j] = 1;
            }
            else if(ch=='S')
            {
                c[i][j] = 2;
            }
            else if(ch=='W')
            {
                c[i][j] = 3;
            }
            else if(ch=='N')
            {
                c[i][j] = 4;
            }
        }
    }
    Dijkstra(1,1);
    if(d[n][m]==oo)
    {
        cout<<-1<<'\n';
        return 0;
    }
    cout<<d[n][m]<<'\n';
    return 0;
}

Compilation message

adventure.cpp: In function 'void Dijkstra(int, int)':
adventure.cpp:36:13: warning: unused variable 'k' [-Wunused-variable]
   36 |         int k = h.top().first;
      |             ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 336 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct

Subtask #5
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 1 ms 332 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 1 ms 332 KB Output is correct
34 Correct 1 ms 332 KB Output is correct
35 Correct 6 ms 588 KB Output is correct
36 Correct 1 ms 332 KB Output is correct
37 Correct 7 ms 844 KB Output is correct
38 Correct 2 ms 1356 KB Output is correct
39 Correct 65 ms 2756 KB Output is correct
40 Correct 68 ms 2800 KB Output is correct
41 Correct 9 ms 2508 KB Output is correct
42 Correct 67 ms 2724 KB Output is correct
43 Correct 63 ms 5920 KB Output is correct
44 Correct 9 ms 2508 KB Output is correct