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Submission #928440

# Submission time Handle Problem Language Result Execution time Memory
928440 2024-02-16T11:46:52 Z n1k Longest Trip (IOI23_longesttrip) C++17
15 / 100
 9 ms 856 KB 
#include "longesttrip.h"
#include <bits/stdc++.h>

using namespace std;

/*

OBSERVE:

path meargen

hinten und vorne dazu

* - * *

* - *

*/

std::vector<int> longest_trip(int N, int D){
    // vorraussetzung path[0].end nicht mit path[1].end verbunden
    vector<int> path[2];
    path[0].push_back(0);

    for(int i=1; i<N; i++){
        if(are_connected({*path[0].rbegin()}, {i})){
            path[0].push_back(i);
            if(path[1].size() and are_connected({path[0][path[0].size()-1]}, {path[1][path[1].size()-1]})){
                reverse(path[1].begin(), path[1].end());
                path[0].insert(path[0].end(), path[1].begin(), path[1].end());
                path[1].clear();
            }
        }else{
            path[1].push_back(i);
        }
    }

    if(path[1].empty() or not are_connected(path[0], path[1])){
        if(path[0].size() > path[1].size())
            return path[0];

        return path[1];
    }

    if(are_connected({path[0][0]}, {path[1][0]})){
        reverse(path[0].begin(), path[0].end());
        path[0].insert(path[0].end(), path[1].begin(), path[1].end());

        return path[0];
    }
    if(are_connected({path[0][0]}, {path[1][path[1].size()-1]})){
        path[1].insert(path[1].end(), path[0].begin(), path[0].end());

        return path[1];
    }
    if(are_connected({path[0][path[0].size()-1]}, {path[1][0]})){
        path[0].insert(path[0].end(), path[1].begin(), path[1].end());

        return path[0];
    }

    // jetzt wissen wir das path[0].begin - path[0].end
    // jetzt wissen wir das path[1].begin - path[1].end
    // und die pfade sind nicht disjoint

    // eine node in path[0] finden die mit path[1] verbunden ist
    // find i

    int li = 0, ri = path[0].size()-1;
    while(li<ri){
        int mi = (li + ri) / 2;
        vector<int> sub(path[0].begin(), path[0].begin()+mi+1);
        if(are_connected(sub, path[1])){
            ri = mi;
        }else{
            li = mi + 1;
        }
    }

    int i = li;

    int lj = 0, rj = path[1].size()-1;
    while(lj<rj){
        int mj = (lj + rj) / 2;
        vector<int> sub(path[1].begin(), path[1].begin()+mj+1);
        if(are_connected({i}, sub)){
            rj = mj;
        }else{
            lj = mj + 1;
        }
    }
    int j = lj;

    vector<int> ans;

    ans.insert(ans.end(), path[0].begin() + i + 1, path[0].end());
    ans.insert(ans.end(), path[0].begin(), path[0].begin() + i + 1);

    ans.insert(ans.end(), path[1].begin() + j, path[1].end());
    ans.insert(ans.end(), path[1].begin(), path[1].begin() + j);

    return ans;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 4 ms 344 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 4 ms 344 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 5 ms 600 KB Output is correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 8 ms 344 KB Output is correct
8 Correct 5 ms 344 KB Output is correct
9 Correct 4 ms 344 KB Output is correct
10 Correct 4 ms 344 KB Output is correct
11 Correct 4 ms 600 KB Output is correct
12 Correct 5 ms 600 KB Output is correct
13 Correct 5 ms 344 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 5 ms 344 KB Output is correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 5 ms 344 KB Output is correct
8 Correct 5 ms 344 KB Output is correct
9 Correct 5 ms 344 KB Output is correct
10 Correct 6 ms 600 KB Output is correct
11 Correct 4 ms 344 KB Output is correct
12 Correct 4 ms 608 KB Output is correct
13 Correct 4 ms 344 KB Output is correct
14 Correct 8 ms 344 KB Output is correct
15 Correct 6 ms 344 KB Output is correct
16 Correct 6 ms 344 KB Output is correct
17 Correct 6 ms 600 KB Output is correct
18 Correct 6 ms 344 KB Output is correct
19 Correct 6 ms 344 KB Output is correct
20 Correct 5 ms 596 KB Output is correct
21 Correct 5 ms 344 KB Output is correct
22 Correct 5 ms 344 KB Output is correct
23 Correct 5 ms 344 KB Output is correct
24 Correct 5 ms 344 KB Output is correct
25 Correct 6 ms 344 KB Output is correct
26 Correct 6 ms 344 KB Output is correct
27 Correct 8 ms 344 KB Output is correct
28 Correct 8 ms 344 KB Output is correct
29 Correct 8 ms 344 KB Output is correct
30 Correct 7 ms 344 KB Output is correct
31 Correct 6 ms 344 KB Output is correct
32 Correct 6 ms 344 KB Output is correct
33 Correct 7 ms 344 KB Output is correct
34 Correct 7 ms 344 KB Output is correct
35 Correct 7 ms 344 KB Output is correct
36 Correct 7 ms 344 KB Output is correct
37 Correct 8 ms 852 KB Output is correct
38 Correct 7 ms 344 KB Output is correct
39 Correct 7 ms 600 KB Output is correct
40 Correct 7 ms 344 KB Output is correct
41 Correct 7 ms 344 KB Output is correct
42 Correct 6 ms 600 KB Output is correct
43 Correct 6 ms 344 KB Output is correct
44 Correct 7 ms 344 KB Output is correct
45 Correct 8 ms 344 KB Output is correct
46 Correct 8 ms 344 KB Output is correct
47 Correct 9 ms 344 KB Output is correct
48 Correct 7 ms 344 KB Output is correct
49 Correct 8 ms 344 KB Output is correct
50 Correct 6 ms 856 KB Output is correct
51 Incorrect 1 ms 344 KB non-disjoint arrays
52 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 4 ms 344 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 5 ms 344 KB Output is correct
8 Correct 6 ms 344 KB Output is correct
9 Correct 4 ms 344 KB Output is correct
10 Correct 4 ms 344 KB Output is correct
11 Correct 4 ms 344 KB Output is correct
12 Correct 4 ms 344 KB Output is correct
13 Correct 5 ms 600 KB Output is correct
14 Correct 8 ms 344 KB Output is correct
15 Correct 6 ms 344 KB Output is correct
16 Correct 9 ms 348 KB Output is correct
17 Correct 6 ms 600 KB Output is correct
18 Correct 6 ms 600 KB Output is correct
19 Correct 6 ms 600 KB Output is correct
20 Correct 5 ms 344 KB Output is correct
21 Correct 8 ms 596 KB Output is correct
22 Correct 6 ms 344 KB Output is correct
23 Correct 7 ms 344 KB Output is correct
24 Correct 7 ms 344 KB Output is correct
25 Correct 7 ms 344 KB Output is correct
26 Correct 6 ms 344 KB Output is correct
27 Correct 9 ms 344 KB Output is correct
28 Correct 6 ms 344 KB Output is correct
29 Correct 7 ms 344 KB Output is correct
30 Correct 7 ms 344 KB Output is correct
31 Correct 8 ms 344 KB Output is correct
32 Correct 8 ms 344 KB Output is correct
33 Correct 7 ms 344 KB Output is correct
34 Correct 7 ms 344 KB Output is correct
35 Correct 7 ms 344 KB Output is correct
36 Correct 8 ms 344 KB Output is correct
37 Correct 6 ms 436 KB Output is correct
38 Incorrect 1 ms 344 KB non-disjoint arrays
39 Halted 0 ms 0 KB -