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Submission #838781

# Submission time Handle Problem Language Result Execution time Memory
838781 2023-08-27T17:55:31 Z nonono Jakarta Skyscrapers (APIO15_skyscraper) C++14
100 / 100
 734 ms 28228 KB 
#include <bits/stdc++.h>
using namespace std;

const int INF = 1e8;
const int mxN = 30005;

int n, m;
vector<vector<int>> adj(mxN);
int b[mxN];
int f[mxN][200];
int vis[mxN];

signed main() {
#define taskname ""

    if(fopen(taskname".inp", "r")) {
        freopen(taskname".inp", "r", stdin);
        freopen(taskname".out", "w", stdout);
    }

    cin.tie(0)->sync_with_stdio(0);
    
    cin >> n >> m;
    int N = sqrt(n);
    
    for(int i = 0; i < m; i ++) {
        int x, y;
        cin >> x >> y;
        
        adj[x].push_back(y);
        b[i] = x;
    }
    
    for(int i = 0; i < n; i ++) {
        for(int j = 0; j <= N; j ++) {
            f[i][j] = INF;
        }
    }
    
    priority_queue<array<int, 3>, vector<array<int, 3>>, greater<array<int, 3>>> pq;
    
    f[b[0]][0] = 0;
    pq.push({0, b[0], 0});
    
    while(!pq.empty()) {
        int u = pq.top()[1];
        int d = pq.top()[0];
        int k = pq.top()[2];
        pq.pop();
        
        if(d > f[u][k]) continue ;
        
        if(u == b[1]) {
            cout << d << "\n";
            return 0;
        }
        
        if(k) {
            for(int i : {-1, 1}) {
                int v = u + k * i;
                if(v >= 0 && v < n && f[v][k] > d + 1) {
                    f[v][k] = d + 1;
                    pq.push({f[v][k], v, k});
                }
            }
        }
        
        if(vis[u]) continue ;
        vis[u] = 1;
        
        for(int p : adj[u]) {
            if(p <= N) {
                for(int i : {-1, 1}) {
                    int v = u + p * i;
                    if(v >= 0 && v < n && f[v][p] > d + 1) {
                        f[v][p] = d + 1;
                        pq.push({f[v][p], v, p});
                    }
                    
                    if(v >= 0 && v < n && f[v][0] > d + 1) {
                        f[v][0] = d + 1;
                        pq.push({f[v][0], v, 0});
                    }
                }
            } else {
                for(int i = 1; u + i * p < n; i ++) {
                    int right = u + i * p;
                    if(f[right][0] > d + i) {
                        f[right][0] = d + i;
                        pq.push({d + i, right, 0});
                    }
                }        
                
                for(int i = 1; u - i * p >= 0; i ++) {
                    int left = u - i * p;
                    if(f[left][0] > d + i) {
                        f[left][0] = d + i;
                        pq.push({d + i, left, 0});
                    }
                }
            }
        }
    }
        
    cout << -1 << "\n";
    return 0;
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
skyscraper.cpp:18:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         freopen(taskname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Correct 1 ms 980 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 980 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 1104 KB Output is correct
3 Correct 1 ms 980 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 980 KB Output is correct
8 Correct 1 ms 980 KB Output is correct
9 Correct 1 ms 980 KB Output is correct
10 Correct 1 ms 1108 KB Output is correct
11 Correct 1 ms 1108 KB Output is correct
12 Correct 1 ms 1108 KB Output is correct
13 Correct 1 ms 1108 KB Output is correct
14 Correct 1 ms 1108 KB Output is correct
15 Correct 1 ms 1108 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Correct 1 ms 980 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 980 KB Output is correct
8 Correct 1 ms 980 KB Output is correct
9 Correct 1 ms 980 KB Output is correct
10 Correct 1 ms 1108 KB Output is correct
11 Correct 1 ms 1108 KB Output is correct
12 Correct 1 ms 1108 KB Output is correct
13 Correct 1 ms 1108 KB Output is correct
14 Correct 1 ms 1108 KB Output is correct
15 Correct 1 ms 1108 KB Output is correct
16 Correct 1 ms 1108 KB Output is correct
17 Correct 1 ms 1620 KB Output is correct
18 Correct 1 ms 2388 KB Output is correct
19 Correct 1 ms 2516 KB Output is correct
20 Correct 1 ms 2644 KB Output is correct
21 Correct 1 ms 1364 KB Output is correct
22 Correct 1 ms 2388 KB Output is correct
23 Correct 2 ms 2260 KB Output is correct
24 Correct 2 ms 2516 KB Output is correct
25 Correct 2 ms 2644 KB Output is correct
26 Correct 1 ms 2644 KB Output is correct
27 Correct 1 ms 2516 KB Output is correct
28 Correct 2 ms 2644 KB Output is correct
29 Correct 7 ms 2644 KB Output is correct
30 Correct 2 ms 2516 KB Output is correct
31 Correct 5 ms 2644 KB Output is correct
32 Correct 2 ms 2644 KB Output is correct
33 Correct 10 ms 2896 KB Output is correct
34 Correct 6 ms 2772 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Correct 1 ms 980 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 980 KB Output is correct
8 Correct 1 ms 980 KB Output is correct
9 Correct 1 ms 1028 KB Output is correct
10 Correct 1 ms 1108 KB Output is correct
11 Correct 1 ms 1108 KB Output is correct
12 Correct 1 ms 1108 KB Output is correct
13 Correct 1 ms 1108 KB Output is correct
14 Correct 1 ms 1108 KB Output is correct
15 Correct 1 ms 1108 KB Output is correct
16 Correct 1 ms 1108 KB Output is correct
17 Correct 1 ms 1620 KB Output is correct
18 Correct 1 ms 2388 KB Output is correct
19 Correct 1 ms 2516 KB Output is correct
20 Correct 1 ms 2644 KB Output is correct
21 Correct 1 ms 1364 KB Output is correct
22 Correct 1 ms 2388 KB Output is correct
23 Correct 1 ms 2260 KB Output is correct
24 Correct 3 ms 2644 KB Output is correct
25 Correct 2 ms 2644 KB Output is correct
26 Correct 1 ms 2644 KB Output is correct
27 Correct 2 ms 2644 KB Output is correct
28 Correct 2 ms 2644 KB Output is correct
29 Correct 7 ms 2644 KB Output is correct
30 Correct 2 ms 2516 KB Output is correct
31 Correct 5 ms 2644 KB Output is correct
32 Correct 3 ms 2644 KB Output is correct
33 Correct 10 ms 2772 KB Output is correct
34 Correct 6 ms 2772 KB Output is correct
35 Correct 5 ms 2516 KB Output is correct
36 Correct 2 ms 2128 KB Output is correct
37 Correct 4 ms 2900 KB Output is correct
38 Correct 5 ms 3028 KB Output is correct
39 Correct 5 ms 3024 KB Output is correct
40 Correct 7 ms 2900 KB Output is correct
41 Correct 6 ms 3028 KB Output is correct
42 Correct 4 ms 2900 KB Output is correct
43 Correct 4 ms 2900 KB Output is correct
44 Correct 4 ms 2900 KB Output is correct
45 Correct 13 ms 3028 KB Output is correct
46 Correct 6 ms 3028 KB Output is correct

Subtask #5
43.0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Correct 1 ms 980 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 980 KB Output is correct
8 Correct 1 ms 980 KB Output is correct
9 Correct 1 ms 980 KB Output is correct
10 Correct 1 ms 1108 KB Output is correct
11 Correct 1 ms 1108 KB Output is correct
12 Correct 1 ms 1108 KB Output is correct
13 Correct 1 ms 1108 KB Output is correct
14 Correct 1 ms 1108 KB Output is correct
15 Correct 1 ms 1108 KB Output is correct
16 Correct 1 ms 1108 KB Output is correct
17 Correct 1 ms 1620 KB Output is correct
18 Correct 1 ms 2388 KB Output is correct
19 Correct 1 ms 2516 KB Output is correct
20 Correct 1 ms 2644 KB Output is correct
21 Correct 1 ms 1364 KB Output is correct
22 Correct 1 ms 2388 KB Output is correct
23 Correct 2 ms 2260 KB Output is correct
24 Correct 2 ms 2516 KB Output is correct
25 Correct 1 ms 2644 KB Output is correct
26 Correct 1 ms 2644 KB Output is correct
27 Correct 1 ms 2644 KB Output is correct
28 Correct 2 ms 2644 KB Output is correct
29 Correct 7 ms 2644 KB Output is correct
30 Correct 3 ms 2516 KB Output is correct
31 Correct 5 ms 2644 KB Output is correct
32 Correct 3 ms 2644 KB Output is correct
33 Correct 11 ms 2828 KB Output is correct
34 Correct 6 ms 2772 KB Output is correct
35 Correct 5 ms 2516 KB Output is correct
36 Correct 2 ms 1876 KB Output is correct
37 Correct 4 ms 2900 KB Output is correct
38 Correct 5 ms 3028 KB Output is correct
39 Correct 7 ms 2920 KB Output is correct
40 Correct 5 ms 2900 KB Output is correct
41 Correct 5 ms 3028 KB Output is correct
42 Correct 4 ms 2900 KB Output is correct
43 Correct 4 ms 2900 KB Output is correct
44 Correct 4 ms 2900 KB Output is correct
45 Correct 17 ms 3028 KB Output is correct
46 Correct 7 ms 3028 KB Output is correct
47 Correct 11 ms 11668 KB Output is correct
48 Correct 12 ms 19668 KB Output is correct
49 Correct 12 ms 21332 KB Output is correct
50 Correct 12 ms 23252 KB Output is correct
51 Correct 23 ms 25752 KB Output is correct
52 Correct 23 ms 25876 KB Output is correct
53 Correct 18 ms 25172 KB Output is correct
54 Correct 13 ms 24532 KB Output is correct
55 Correct 13 ms 24532 KB Output is correct
56 Correct 18 ms 25684 KB Output is correct
57 Correct 12 ms 24532 KB Output is correct
58 Correct 16 ms 24916 KB Output is correct
59 Correct 17 ms 24916 KB Output is correct
60 Correct 22 ms 24916 KB Output is correct
61 Correct 17 ms 24916 KB Output is correct
62 Correct 37 ms 25684 KB Output is correct
63 Correct 46 ms 26572 KB Output is correct
64 Correct 52 ms 26444 KB Output is correct
65 Correct 237 ms 26444 KB Output is correct
66 Correct 734 ms 27976 KB Output is correct
67 Correct 358 ms 28228 KB Output is correct