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Submission #457704

# Submission time Handle Problem Language Result Execution time Memory
457704 2021-08-07T10:01:19 Z SamAnd Awesome Arrowland Adventure (eJOI19_adventure) C++17
100 / 100
 83 ms 13404 KB 
#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define fi first
#define se second
typedef long long ll;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
mt19937 rnf(2106);
const int N = 502;
const int xx[4] = {0, 1, 0, -1};
const int yy[4] = {1, 0, -1, 0};
const char cc[4] = {'E', 'S', 'W', 'N'};

int n, m;
char a[N][N];

struct ban
{
    int x, y, d;
    ban(){}
    ban(int x, int y, int d)
    {
        this->x = x;
        this->y = y;
        this->d = d;
    }
};
bool operator<(const ban& a, const ban& b)
{
    return a.d > b.d;
}

bool c[N][N];

void solv()
{
    cin >> n >> m;
    for (int i = 1; i <= n; ++i)
        cin >> (a[i] + 1);

    priority_queue<ban> q;
    q.push(ban(n, m, 0));
    while (1)
    {
        ban t;
        do
        {
            if (q.empty())
            {
                cout << "-1\n";
                return;
            }
            t = q.top();
            q.pop();
        } while (c[t.x][t.y]);
        c[t.x][t.y] = true;
        if (t.x == 1 && t.y == 1)
        {
            cout << t.d << "\n";
            return;
        }
        for (int i = 0; i < 4; ++i)
        {
            int hx = t.x + xx[i];
            int hy = t.y + yy[i];
            if (1 <= hx && hx <= n && 1 <= hy && hy <= m)
            {
                int j = (i + 2) % 4;
                int u = -1;
                for (int k = 0; k < 4; ++k)
                {
                    if (a[hx][hy] == cc[k])
                    {
                        u = k;
                        break;
                    }
                }
                if (u != -1)
                {
                    int dd;
                    if (u <= j)
                        dd = j - u;
                    else
                        dd = j + 4 - u;
                    q.push(ban(hx, hy, t.d + dd));
                }
            }
        }
    }
}

int main()
{
    #ifdef SOMETHING
    freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    #endif // SOMETHING
    ios_base::sync_with_stdio(false), cin.tie(0);

    int tt = 1;
    //cin >> tt;
    while (tt--)
    {
        solv();
    }
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 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 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 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 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 0 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 1 ms 332 KB Output is correct
19 Correct 0 ms 332 KB Output is correct
20 Correct 1 ms 328 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 0 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 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 0 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 0 ms 204 KB Output is correct
9 Correct 0 ms 204 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 332 KB Output is correct
2 Correct 0 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 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 0 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 1 ms 332 KB Output is correct
19 Correct 0 ms 332 KB Output is correct
20 Correct 1 ms 328 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 0 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 0 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 0 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 0 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 1 ms 332 KB Output is correct
35 Correct 1 ms 332 KB Output is correct
36 Correct 1 ms 332 KB Output is correct
37 Correct 7 ms 452 KB Output is correct
38 Correct 11 ms 588 KB Output is correct
39 Correct 71 ms 1128 KB Output is correct
40 Correct 83 ms 1120 KB Output is correct
41 Correct 69 ms 1144 KB Output is correct
42 Correct 71 ms 1140 KB Output is correct
43 Correct 69 ms 13404 KB Output is correct
44 Correct 73 ms 1108 KB Output is correct