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Submission #896564

# Submission time Handle Problem Language Result Execution time Memory
896564 2024-01-01T16:55:13 Z Aiperiii Railway Trip (JOI17_railway_trip) C++14
5 / 100
 2000 ms 12156 KB 
#include <bits/stdc++.h>
#define int long long
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
using namespace std;
signed main(){
    ios_base::sync_with_stdio();
    cin.tie(0);
    int n,k,q;
    cin>>n>>k>>q;
    vector <int> l(n);
    for(int i=0;i<n;i++)cin>>l[i];
    vector <int> g[n];
    for(int i=0;i<n;i++){
        int mx=0;
        for(int j=i+1;j<n;j++){
            if(l[j]>mx){
                mx=l[j];
                g[i].pb(j);
                g[j].pb(i);
            }
            if(mx>=l[i])break;
        }
    }
    while(q--){
        int a,b;
        cin>>a>>b;
        a--;
        b--;
        set <pair <int,int> > st;
        vector <int> d(n,1e18);
        st.insert({0,a});
        d[a]=0;
        while(!st.empty()){
            int v=st.begin()->second;
            st.erase(st.begin());
            for(auto to : g[v]){
                if(d[to]>d[v]+1){
                    st.erase({d[to],to});
                    d[to]=d[v]+1;
                    st.insert({d[to],to});
                }
            }
        }
        int x=d[b]-1;
        cout<<x<<"\n";
    }
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 432 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 348 KB Output is correct
2 Correct 554 ms 9832 KB Output is correct
3 Correct 591 ms 9552 KB Output is correct
4 Correct 629 ms 9808 KB Output is correct
5 Correct 640 ms 9808 KB Output is correct
6 Correct 704 ms 10312 KB Output is correct
7 Correct 831 ms 11680 KB Output is correct
8 Correct 238 ms 7684 KB Output is correct
9 Execution timed out 2066 ms 8648 KB Time limit exceeded
10 Halted 0 ms 0 KB -

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2005 ms 9664 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 55.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2049 ms 12156 KB Time limit exceeded
2 Halted 0 ms 0 KB -