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Submission #595547

# Submission time Handle Problem Language Result Execution time Memory
595547 2022-07-13T20:12:04 Z ThegeekKnight16 Event Hopping (BOI22_events) C++14
10 / 100
 1500 ms 32716 KB 
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1e5 + 10;
int Inicio[MAXN], Fim[MAXN];
vector<int> Indices;
vector<int> grafo[MAXN];
int Marc[MAXN], Dist[MAXN];

void bfs(int v, int N)
{
    for (int i = 1; i <= N; i++) {Marc[i] = 0; Dist[i] = 1e9 + 10;}
    queue<int> q;
    Marc[v] = 1; Dist[v] = 0;
    q.push(v);
    
    while (!q.empty())
    {
        int cur = q.front(); q.pop();
        
        for (auto viz : grafo[cur])
        {
            if (Marc[viz]) continue;
            Dist[viz] = Dist[cur] + 1;
            Marc[viz] = 1;
            q.push(viz);
        }
    }
}

bool cmp(int a, int b)
{
    if (Fim[a] == Fim[b]) return Inicio[a] < Inicio[b];
    return Fim[a] > Fim[b];
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int N, Q;
    cin >> N >> Q;
    for (int i = 1; i <= N; i++)
    {
        cin >> Inicio[i] >> Fim[i];
        Indices.push_back(i);
    }
    sort(Indices.begin(), Indices.end(), cmp);
    
    for (int i = 0; i < Indices.size(); i++)
    {
        int id = Indices[i];
        for (int j = 0; j < Indices.size(); j++)
        {
            int jd = Indices[j];
            
            if (Inicio[jd] <= Fim[id] && Fim[id] <= Fim[jd]) {grafo[id].push_back(jd);}
        }
    }
    
    for (int q = 1; q <= Q; q++)
    {
        int X, Y;
        cin >> X >> Y;
        
        bfs(X, N);
        
        if (Dist[Y] == 1e9 + 10) cout << "impossible" << '\n';
        else cout << Dist[Y] << '\n';
    }
}

Compilation message

events.cpp: In function 'int main()':
events.cpp:49:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for (int i = 0; i < Indices.size(); i++)
      |                     ~~^~~~~~~~~~~~~~~~
events.cpp:52:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |         for (int j = 0; j < Indices.size(); j++)
      |                         ~~^~~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Execution timed out 1574 ms 4052 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 4 ms 2644 KB Output is correct
4 Correct 5 ms 2704 KB Output is correct
5 Correct 4 ms 2748 KB Output is correct
6 Correct 9 ms 3464 KB Output is correct
7 Correct 18 ms 4308 KB Output is correct
8 Correct 23 ms 5384 KB Output is correct
9 Correct 90 ms 6720 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 4 ms 2644 KB Output is correct
4 Correct 5 ms 2704 KB Output is correct
5 Correct 4 ms 2748 KB Output is correct
6 Correct 9 ms 3464 KB Output is correct
7 Correct 18 ms 4308 KB Output is correct
8 Correct 23 ms 5384 KB Output is correct
9 Correct 90 ms 6720 KB Output is correct
10 Correct 1 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 5 ms 2644 KB Output is correct
13 Correct 4 ms 2644 KB Output is correct
14 Correct 5 ms 2644 KB Output is correct
15 Correct 8 ms 3412 KB Output is correct
16 Correct 16 ms 4308 KB Output is correct
17 Correct 18 ms 5332 KB Output is correct
18 Correct 80 ms 6724 KB Output is correct
19 Execution timed out 1584 ms 32716 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 4 ms 2644 KB Output is correct
4 Correct 5 ms 2704 KB Output is correct
5 Correct 4 ms 2748 KB Output is correct
6 Correct 9 ms 3464 KB Output is correct
7 Correct 18 ms 4308 KB Output is correct
8 Correct 23 ms 5384 KB Output is correct
9 Correct 90 ms 6720 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 5 ms 2644 KB Output is correct
13 Correct 4 ms 2708 KB Output is correct
14 Correct 4 ms 2644 KB Output is correct
15 Correct 8 ms 3412 KB Output is correct
16 Correct 17 ms 4248 KB Output is correct
17 Correct 17 ms 5332 KB Output is correct
18 Correct 82 ms 6612 KB Output is correct
19 Execution timed out 1529 ms 4796 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 1574 ms 4240 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 1574 ms 4052 KB Time limit exceeded
3 Halted 0 ms 0 KB -