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Submission #595538

# Submission time Handle Problem Language Result Execution time Memory
595538 2022-07-13T20:01:16 Z Sofiatpc Event Hopping (BOI22_events) C++14
10 / 100
 1500 ms 32816 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAXN = 100005;
int s[MAXN], e[MAXN], dist[MAXN];
vector<int> adj[MAXN];

void bfs(int S)//S eh um id
{
    vector< int > fila;
    dist[S]=0;
    fila.push_back(S);
    int ptr = 0;
    while(ptr!=fila.size())
    {
        int x = fila[ptr];
        ptr++;
        for(int i = 0; i < (int)adj[x].size(); i++)
        {
            int viz=adj[x][i];
            if(dist[viz]!=-1&&dist[viz]<=dist[x]+1)continue;
            dist[viz]=dist[x]+1;
            fila.push_back(viz);
        }
    }
}

int main()
{
    int N,Q; cin>>N>>Q;
    for(int i = 1; i <= N; i++)cin>>s[i]>>e[i];

    for(int i = 1; i <= N; i++)
        for(int j = 1; j <= N; j++)
        {
            if(i==j)continue;
            if(s[j]<=e[i] && e[i]<=e[j])adj[i].push_back(j);
        }

    for(int q = 1; q <= Q; q++)
    {
        int sx,ex;
        cin>>sx>>ex;

        for(int i = 1; i <= N; i++)dist[i]=-1;
        bfs(sx);

        if(dist[ex]==-1)cout<<"impossible\n";
        else cout<<dist[ex]<<"\n";
    }

}

Compilation message

events.cpp: In function 'void bfs(int)':
events.cpp:15:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     while(ptr!=fila.size())
      |           ~~~^~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Execution timed out 1541 ms 3964 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 9 ms 2644 KB Output is correct
4 Correct 7 ms 2644 KB Output is correct
5 Correct 8 ms 2644 KB Output is correct
6 Correct 14 ms 3412 KB Output is correct
7 Correct 29 ms 4224 KB Output is correct
8 Correct 31 ms 5332 KB Output is correct
9 Correct 144 ms 6644 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 9 ms 2644 KB Output is correct
4 Correct 7 ms 2644 KB Output is correct
5 Correct 8 ms 2644 KB Output is correct
6 Correct 14 ms 3412 KB Output is correct
7 Correct 29 ms 4224 KB Output is correct
8 Correct 31 ms 5332 KB Output is correct
9 Correct 144 ms 6644 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 10 ms 2644 KB Output is correct
13 Correct 8 ms 2644 KB Output is correct
14 Correct 8 ms 2696 KB Output is correct
15 Correct 13 ms 3412 KB Output is correct
16 Correct 27 ms 4308 KB Output is correct
17 Correct 30 ms 5332 KB Output is correct
18 Correct 140 ms 6612 KB Output is correct
19 Execution timed out 1586 ms 32816 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 9 ms 2644 KB Output is correct
4 Correct 7 ms 2644 KB Output is correct
5 Correct 8 ms 2644 KB Output is correct
6 Correct 14 ms 3412 KB Output is correct
7 Correct 29 ms 4224 KB Output is correct
8 Correct 31 ms 5332 KB Output is correct
9 Correct 144 ms 6644 KB Output is correct
10 Correct 2 ms 2688 KB Output is correct
11 Correct 1 ms 2644 KB Output is correct
12 Correct 9 ms 2644 KB Output is correct
13 Correct 8 ms 2644 KB Output is correct
14 Correct 9 ms 2644 KB Output is correct
15 Correct 18 ms 3416 KB Output is correct
16 Correct 41 ms 4224 KB Output is correct
17 Correct 39 ms 5332 KB Output is correct
18 Correct 182 ms 6624 KB Output is correct
19 Execution timed out 1571 ms 4244 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1560 ms 3952 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Execution timed out 1541 ms 3964 KB Time limit exceeded
3 Halted 0 ms 0 KB -