oj.uz

Submission #714221

# Submission time Handle Problem Language Result Execution time Memory
714221 2023-03-24T06:40:54 Z vjudge1 Event Hopping (BOI22_events) C++17
10 / 100
 1500 ms 128404 KB 
#include <bits/stdc++.h>
using namespace std;
vector<vector<int>>g;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, q;
    cin >> n >> q;
    g.resize(n + 1);
    vector<pair<int, int>>events(n + 1);
    for(int i = 1;i <= n;++i){
        cin >> events[i].first >> events[i].second;
    }
    for(int i = 1;i <= n;++i){
        for(int j = 1;j <= n;++j){
            if(i == j)continue;
            if(events[i].second >= events[j].first && events[i].second <= events[j].second){
                g[i].push_back(j);
            }
        }
    }
//    for(int i = 1;i <= n;++i){
//        cout << i << ": ";
//        for(int j : g[i]){
//            cout << j << " ";
//        }
//        cout << '\n';
//    }
    vector<vector<int>>dist(n + 1, vector<int>(n + 1, -1));
    for(int i = 1;i <= n;++i){
        dist[i][i] = 0;
        queue<int>q;
        q.push(i);
        while(!q.empty()){
            int cur = q.front();
            q.pop();
            for(int v : g[cur]){
                if(dist[i][v] == -1){
                    dist[i][v] = dist[i][cur] + 1;
                    q.push(v);
                }
            }
        }
    }
    while(q--){
        int u, v;
        cin >> u >> v;
        if(dist[u][v] == -1)cout << "impossible\n";
        else cout << dist[u][v] << '\n';
    }
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 1572 ms 3660 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 16 ms 4284 KB Output is correct
4 Correct 11 ms 4308 KB Output is correct
5 Correct 16 ms 4308 KB Output is correct
6 Correct 56 ms 5100 KB Output is correct
7 Correct 159 ms 5912 KB Output is correct
8 Correct 217 ms 6868 KB Output is correct
9 Correct 1085 ms 8332 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 16 ms 4284 KB Output is correct
4 Correct 11 ms 4308 KB Output is correct
5 Correct 16 ms 4308 KB Output is correct
6 Correct 56 ms 5100 KB Output is correct
7 Correct 159 ms 5912 KB Output is correct
8 Correct 217 ms 6868 KB Output is correct
9 Correct 1085 ms 8332 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 16 ms 4308 KB Output is correct
13 Correct 12 ms 4308 KB Output is correct
14 Correct 19 ms 4332 KB Output is correct
15 Correct 75 ms 5016 KB Output is correct
16 Correct 163 ms 5876 KB Output is correct
17 Correct 196 ms 6968 KB Output is correct
18 Correct 1165 ms 8324 KB Output is correct
19 Execution timed out 1581 ms 128404 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 16 ms 4284 KB Output is correct
4 Correct 11 ms 4308 KB Output is correct
5 Correct 16 ms 4308 KB Output is correct
6 Correct 56 ms 5100 KB Output is correct
7 Correct 159 ms 5912 KB Output is correct
8 Correct 217 ms 6868 KB Output is correct
9 Correct 1085 ms 8332 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 17 ms 4336 KB Output is correct
13 Correct 12 ms 4308 KB Output is correct
14 Correct 18 ms 4340 KB Output is correct
15 Correct 57 ms 5088 KB Output is correct
16 Correct 164 ms 5912 KB Output is correct
17 Correct 203 ms 6968 KB Output is correct
18 Correct 1158 ms 8324 KB Output is correct
19 Execution timed out 1573 ms 3772 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 1570 ms 3576 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 212 KB Output is correct
2 Execution timed out 1572 ms 3660 KB Time limit exceeded
3 Halted 0 ms 0 KB -