oj.uz

Submission #678617

# Submission time Handle Problem Language Result Execution time Memory
678617 2023-01-06T08:40:16 Z qwerasdfzxcl Jakarta Skyscrapers (APIO15_skyscraper) C++17
100 / 100
 293 ms 120140 KB 
#include <bits/stdc++.h>

typedef long long ll;
using namespace std;
constexpr int INF = 1e9+100;

struct my_bitset{
    unsigned long long bit[500];
    bool find(int x){return bit[x/64]&(1LL<<(x&63));}
    void insert(int x){bit[x/64] |= (1LL<<(x&63));}
};

int dist[30030], visited[30030];
my_bitset st[30030];
vector<int> a[30030];

struct Vertex{
    int s, p;
    Vertex(){}
    Vertex(int _s, int _p): s(_s), p(_p) {}
    //bool operator < (const Vertex &V) const{return d > V.d;}
};

int main(){
    int n, m, s, e;
    scanf("%d %d", &n, &m);
    for (int i=1;i<=m;i++){
        int x, p;
        scanf("%d %d", &x, &p);
        ++x;

        a[x].push_back(p);

        if (i==1) s = x;
        if (i==2) e = x;
    }

    fill(dist+1, dist+n+1, INF);
    fill(visited+1, visited+n+1, 0);
    dist[s] = 0;
    for (int i=1;i<=n;i++){
        sort(a[i].begin(), a[i].end());
        a[i].erase(unique(a[i].begin(), a[i].end()), a[i].end());
    }

    stack<Vertex, vector<Vertex>> pq[2];
    pq[0].emplace(s, 0);
    int d = 0;

    while(true){
        if (pq[d&1].empty() && pq[(d+1)&1].empty()) break;
        if (pq[d&1].empty()) {d++; continue;}

        auto [s, p] = pq[d&1].top(); pq[d&1].pop();
        dist[s] = min(dist[s], d);
        if (p){
            if (st[s].find(p)) continue;
            st[s].insert(p);
            if (s-p > 0) pq[(d+1)&1].emplace(s-p, p);
            if (s+p <= n) pq[(d+1)&1].emplace(s+p, p);
        }

        if (!visited[s]){
            visited[s] = 1;
            for (auto &p2:a[s]){
                st[s].insert(p2);
                if (s-p2 > 0) pq[(d+1)&1].emplace(s-p2, p2);
                if (s+p2 <= n) pq[(d+1)&1].emplace(s+p2, p2);
            }
        }
    }

    /*for (int z=1;z<=n;z++){
        int mn = INF, idx = -1;
        for (int i=1;i<=n;i++) if (!visited[i] && mn > dist[i]){
            mn = dist[i];
            idx = i;
        }
        if (idx==-1) break;
        visited[idx] = 1;

        for (auto &p:a[idx]){
            for (int i=idx-p, j=1;i>0;i-=p, j++) dist[i] = min(dist[i], dist[idx] + j);
            for (int i=idx+p, j=1;i<=n;i+=p, j++) dist[i] = min(dist[i], dist[idx] + j);
        }
    }*/

    if (dist[e]==INF) printf("-1\n");
    else printf("%d\n", dist[e]);
    return 0;
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:26:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
skyscraper.cpp:29:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         scanf("%d %d", &x, &p);
      |         ~~~~~^~~~~~~~~~~~~~~~~
skyscraper.cpp:20:40: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
   20 |     Vertex(int _s, int _p): s(_s), p(_p) {}
      |                                        ^
skyscraper.cpp:25:15: note: 's' was declared here
   25 |     int n, m, s, e;
      |               ^
skyscraper.cpp:88:15: warning: 'e' may be used uninitialized in this function [-Wmaybe-uninitialized]
   88 |     if (dist[e]==INF) printf("-1\n");
      |         ~~~~~~^

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 1016 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 1020 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 1024 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 1140 KB Output is correct
9 Correct 1 ms 1236 KB Output is correct
10 Correct 1 ms 1364 KB Output is correct
11 Correct 1 ms 1364 KB Output is correct
12 Correct 1 ms 1364 KB Output is correct
13 Correct 1 ms 1364 KB Output is correct
14 Correct 2 ms 1408 KB Output is correct
15 Correct 1 ms 1492 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 1016 KB Output is correct
4 Correct 1 ms 1012 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 1140 KB Output is correct
9 Correct 1 ms 1236 KB Output is correct
10 Correct 1 ms 1364 KB Output is correct
11 Correct 2 ms 1408 KB Output is correct
12 Correct 1 ms 1364 KB Output is correct
13 Correct 1 ms 1364 KB Output is correct
14 Correct 2 ms 1492 KB Output is correct
15 Correct 2 ms 1408 KB Output is correct
16 Correct 1 ms 980 KB Output is correct
17 Correct 4 ms 3968 KB Output is correct
18 Correct 1 ms 980 KB Output is correct
19 Correct 1 ms 1108 KB Output is correct
20 Correct 6 ms 8916 KB Output is correct
21 Correct 1 ms 980 KB Output is correct
22 Correct 1 ms 980 KB Output is correct
23 Correct 5 ms 7124 KB Output is correct
24 Correct 6 ms 8532 KB Output is correct
25 Correct 6 ms 8868 KB Output is correct
26 Correct 6 ms 8788 KB Output is correct
27 Correct 6 ms 8836 KB Output is correct
28 Correct 6 ms 8916 KB Output is correct
29 Correct 6 ms 8820 KB Output is correct
30 Correct 5 ms 8788 KB Output is correct
31 Correct 6 ms 8788 KB Output is correct
32 Correct 6 ms 8824 KB Output is correct
33 Correct 8 ms 8916 KB Output is correct
34 Correct 8 ms 8956 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 1016 KB Output is correct
4 Correct 1 ms 1020 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 1144 KB Output is correct
9 Correct 1 ms 1144 KB Output is correct
10 Correct 1 ms 1372 KB Output is correct
11 Correct 2 ms 1500 KB Output is correct
12 Correct 1 ms 1372 KB Output is correct
13 Correct 1 ms 1372 KB Output is correct
14 Correct 2 ms 1492 KB Output is correct
15 Correct 2 ms 1492 KB Output is correct
16 Correct 1 ms 1024 KB Output is correct
17 Correct 3 ms 4052 KB Output is correct
18 Correct 1 ms 980 KB Output is correct
19 Correct 1 ms 1020 KB Output is correct
20 Correct 5 ms 8916 KB Output is correct
21 Correct 1 ms 980 KB Output is correct
22 Correct 1 ms 980 KB Output is correct
23 Correct 4 ms 7124 KB Output is correct
24 Correct 6 ms 8532 KB Output is correct
25 Correct 6 ms 8916 KB Output is correct
26 Correct 6 ms 8792 KB Output is correct
27 Correct 6 ms 8788 KB Output is correct
28 Correct 6 ms 8944 KB Output is correct
29 Correct 7 ms 8916 KB Output is correct
30 Correct 5 ms 8788 KB Output is correct
31 Correct 6 ms 8916 KB Output is correct
32 Correct 5 ms 8788 KB Output is correct
33 Correct 8 ms 8916 KB Output is correct
34 Correct 8 ms 8912 KB Output is correct
35 Correct 13 ms 7552 KB Output is correct
36 Correct 5 ms 5460 KB Output is correct
37 Correct 15 ms 9900 KB Output is correct
38 Correct 17 ms 10372 KB Output is correct
39 Correct 17 ms 10192 KB Output is correct
40 Correct 16 ms 10240 KB Output is correct
41 Correct 16 ms 10192 KB Output is correct
42 Correct 11 ms 9300 KB Output is correct
43 Correct 10 ms 9300 KB Output is correct
44 Correct 10 ms 9216 KB Output is correct
45 Correct 21 ms 10312 KB Output is correct
46 Correct 22 ms 10304 KB Output is correct

Subtask #5
43.0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1012 KB Output is correct
2 Correct 1 ms 1016 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 1108 KB Output is correct
9 Correct 1 ms 1236 KB Output is correct
10 Correct 1 ms 1404 KB Output is correct
11 Correct 1 ms 1492 KB Output is correct
12 Correct 1 ms 1364 KB Output is correct
13 Correct 1 ms 1364 KB Output is correct
14 Correct 1 ms 1404 KB Output is correct
15 Correct 2 ms 1492 KB Output is correct
16 Correct 1 ms 980 KB Output is correct
17 Correct 3 ms 4052 KB Output is correct
18 Correct 1 ms 980 KB Output is correct
19 Correct 1 ms 1108 KB Output is correct
20 Correct 6 ms 8916 KB Output is correct
21 Correct 1 ms 1024 KB Output is correct
22 Correct 1 ms 1020 KB Output is correct
23 Correct 5 ms 7124 KB Output is correct
24 Correct 6 ms 8524 KB Output is correct
25 Correct 6 ms 8812 KB Output is correct
26 Correct 6 ms 8788 KB Output is correct
27 Correct 6 ms 8852 KB Output is correct
28 Correct 7 ms 8916 KB Output is correct
29 Correct 7 ms 8916 KB Output is correct
30 Correct 6 ms 8788 KB Output is correct
31 Correct 6 ms 8916 KB Output is correct
32 Correct 5 ms 8788 KB Output is correct
33 Correct 8 ms 8916 KB Output is correct
34 Correct 8 ms 9000 KB Output is correct
35 Correct 12 ms 7552 KB Output is correct
36 Correct 5 ms 5460 KB Output is correct
37 Correct 14 ms 9900 KB Output is correct
38 Correct 20 ms 10336 KB Output is correct
39 Correct 20 ms 10396 KB Output is correct
40 Correct 16 ms 10212 KB Output is correct
41 Correct 17 ms 10240 KB Output is correct
42 Correct 10 ms 9300 KB Output is correct
43 Correct 12 ms 9316 KB Output is correct
44 Correct 10 ms 9300 KB Output is correct
45 Correct 22 ms 10312 KB Output is correct
46 Correct 22 ms 10312 KB Output is correct
47 Correct 62 ms 51620 KB Output is correct
48 Correct 8 ms 1924 KB Output is correct
49 Correct 7 ms 1792 KB Output is correct
50 Correct 5 ms 1748 KB Output is correct
51 Correct 95 ms 119856 KB Output is correct
52 Correct 86 ms 119896 KB Output is correct
53 Correct 68 ms 119488 KB Output is correct
54 Correct 33 ms 61416 KB Output is correct
55 Correct 44 ms 80512 KB Output is correct
56 Correct 67 ms 119736 KB Output is correct
57 Correct 79 ms 118648 KB Output is correct
58 Correct 71 ms 118808 KB Output is correct
59 Correct 86 ms 118816 KB Output is correct
60 Correct 75 ms 118868 KB Output is correct
61 Correct 73 ms 118888 KB Output is correct
62 Correct 102 ms 119576 KB Output is correct
63 Correct 142 ms 119580 KB Output is correct
64 Correct 164 ms 119488 KB Output is correct
65 Correct 190 ms 120000 KB Output is correct
66 Correct 293 ms 120140 KB Output is correct
67 Correct 285 ms 120128 KB Output is correct