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Submission #839880

# Submission time Handle Problem Language Result Execution time Memory
839880 2023-08-30T19:19:18 Z jtnydv25 Longest Trip (IOI23_longesttrip) C++17
85 / 100
 35 ms 508 KB 
#include "longesttrip.h"

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define all(c) ((c).begin()), ((c).end())
#define sz(x) ((int)(x).size())

#ifdef LOCAL
#include <print.h>
#else
#define trace(...)
#define endl "\n" // remove in interactive
#endif

vector<vector<int>>  remove(vector<vector<int>> P, int a, int b){
    vector<vector<int>> ret;
    for(int i = 0; i < sz(P); i++) if(i != a && i != b) ret.push_back(P[i]);
    return ret;
}

vector<int> longest_trip(int n, int d){
    vector<vector<int>> paths;
    
    vector<int> nodes(n), b(n - 1);
    iota(all(nodes), 0);
    random_shuffle(all(nodes));
    // for(int i = 0; i < n - 1; i++){
    //     b[i] = are_connected({nodes[i]}, {nodes[i + 1]});
    // }
    // vector<int> vis(n);
    // for(int i = 0; i < n; i++) if(!vis[i]){
    //     int j = i;
    //     vector<int> path;
    //     while(j < n){
    //         path.push_back(nodes[j]);
    //         vis[j] = true;
    //         if(j == n - 1) break;
    //         if(j < n - 1 && b[j]){
    //             j++;
    //             continue;
    //         } else if(j < n - 2 && !b[j + 1]){
    //             j += 2;
    //             continue;
    //         }
    //         break;
    //     }
    //     paths.push_back(path);
    // }
    for(int i = 0; i < n; i++) paths.push_back({i});
    if(sz(paths) == 1) return paths[0];
    // return {};
    while(sz(paths) > 2){
        int k = sz(paths);
        int p = rand() % k, q = rand() % k, r = rand() % k;
        while(p == q || q == r || p == r){
            p = rand() % k, q = rand() % k, r = rand() % k;
        }
        int pp = p, qq = q;
        if(!are_connected({paths[p][0]}, {paths[q][0]})){
            if(rand() % 2) swap(p, q);
            if(are_connected({paths[q][0]}, {paths[r][0]})){
                pp = q; qq = r;
            } else{
                // qq = r;
                pp = p; qq = r;
            }
        }
        vector<int> newpath = paths[pp];
        reverse(all(newpath));
        copy(all(paths[qq]), back_inserter(newpath));
        paths = remove(paths, pp, qq);
        paths.push_back(newpath);
    }

    for(int i = 0; i < 2; i++){
        for(int j = 0; j < 2; j++){
            if(are_connected({paths[0][0]}, {paths[1][0]})){
                vector<int> Q = paths[0];
                reverse(all(Q));
                copy(all(paths[1]), back_inserter(Q));
                return Q;
            }
            reverse(all(paths[1]));
        }
        reverse(all(paths[0]));
    }

    vector<int> P = paths[0], Q = paths[1];
    if(are_connected(paths[0], paths[1])){
        for(int i = 0; i < 2; i++){
            while(sz(paths[i]) > 1){
                int k = sz(paths[i]) / 2;
                vector<int> lft(paths[i].begin(), paths[i].begin() + k);
                vector<int> rgt(paths[i].begin() + k, paths[i].end());
                if(are_connected(lft, paths[i ^ 1])){
                    paths[i] = lft;
                } else paths[i] = rgt;
            }
        }
        // assert(are_connected({paths[0][0]}, {paths[1][0]}));
        vector<int> final_path;
        int posP = find(all(P), paths[0][0]) - P.begin();
        int posQ = find(all(Q), paths[1][0]) - Q.begin();
        posP = (posP + 1) % sz(P);
        rotate(P.begin(), P.begin() + posP, P.end());
        rotate(Q.begin(), Q.begin() + posQ, Q.end());
        copy(all(Q), back_inserter(P));
        return P;
    }

    return sz(paths[0]) > sz(paths[1]) ? paths[0] : paths[1];
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 6 ms 336 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 208 KB Output is correct
2 Correct 10 ms 208 KB Output is correct
3 Correct 10 ms 336 KB Output is correct
4 Correct 17 ms 352 KB Output is correct
5 Correct 27 ms 372 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 208 KB Output is correct
2 Correct 8 ms 208 KB Output is correct
3 Correct 12 ms 308 KB Output is correct
4 Correct 18 ms 356 KB Output is correct
5 Correct 24 ms 380 KB Output is correct
6 Correct 12 ms 208 KB Output is correct
7 Correct 9 ms 208 KB Output is correct
8 Correct 9 ms 304 KB Output is correct
9 Correct 16 ms 336 KB Output is correct
10 Correct 20 ms 364 KB Output is correct
11 Correct 22 ms 368 KB Output is correct
12 Correct 22 ms 372 KB Output is correct
13 Correct 24 ms 372 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 208 KB Output is correct
2 Correct 13 ms 208 KB Output is correct
3 Correct 8 ms 208 KB Output is correct
4 Correct 16 ms 352 KB Output is correct
5 Correct 24 ms 372 KB Output is correct
6 Correct 7 ms 208 KB Output is correct
7 Correct 11 ms 208 KB Output is correct
8 Correct 9 ms 336 KB Output is correct
9 Correct 14 ms 356 KB Output is correct
10 Correct 24 ms 380 KB Output is correct
11 Correct 25 ms 380 KB Output is correct
12 Correct 21 ms 336 KB Output is correct
13 Correct 26 ms 364 KB Output is correct
14 Correct 13 ms 208 KB Output is correct
15 Correct 10 ms 208 KB Output is correct
16 Correct 11 ms 208 KB Output is correct
17 Correct 14 ms 208 KB Output is correct
18 Correct 11 ms 336 KB Output is correct
19 Correct 17 ms 332 KB Output is correct
20 Correct 18 ms 360 KB Output is correct
21 Correct 28 ms 380 KB Output is correct
22 Correct 24 ms 368 KB Output is correct
23 Correct 19 ms 380 KB Output is correct
24 Correct 21 ms 376 KB Output is correct
25 Correct 15 ms 208 KB Output is correct
26 Correct 19 ms 208 KB Output is correct
27 Correct 19 ms 256 KB Output is correct
28 Correct 14 ms 208 KB Output is correct
29 Correct 17 ms 300 KB Output is correct
30 Correct 12 ms 332 KB Output is correct
31 Correct 17 ms 336 KB Output is correct
32 Correct 10 ms 356 KB Output is correct
33 Correct 14 ms 352 KB Output is correct
34 Correct 14 ms 352 KB Output is correct
35 Correct 13 ms 352 KB Output is correct
36 Correct 22 ms 376 KB Output is correct
37 Correct 24 ms 364 KB Output is correct
38 Correct 22 ms 376 KB Output is correct
39 Correct 23 ms 364 KB Output is correct
40 Correct 21 ms 352 KB Output is correct
41 Correct 22 ms 376 KB Output is correct
42 Correct 26 ms 356 KB Output is correct
43 Correct 35 ms 376 KB Output is correct
44 Correct 27 ms 376 KB Output is correct
45 Correct 9 ms 212 KB Output is correct
46 Correct 12 ms 208 KB Output is correct
47 Correct 14 ms 208 KB Output is correct
48 Correct 12 ms 212 KB Output is correct
49 Correct 15 ms 208 KB Output is correct
50 Correct 14 ms 336 KB Output is correct
51 Correct 19 ms 336 KB Output is correct
52 Correct 21 ms 316 KB Output is correct
53 Correct 17 ms 332 KB Output is correct
54 Correct 16 ms 352 KB Output is correct
55 Correct 18 ms 384 KB Output is correct
56 Correct 26 ms 384 KB Output is correct
57 Correct 31 ms 360 KB Output is correct
58 Correct 31 ms 372 KB Output is correct
59 Correct 28 ms 472 KB Output is correct
60 Correct 19 ms 348 KB Output is correct
61 Correct 27 ms 384 KB Output is correct
62 Correct 24 ms 364 KB Output is correct
63 Correct 28 ms 364 KB Output is correct
64 Correct 30 ms 372 KB Output is correct

Subtask #4
45.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 208 KB Output is correct
2 Correct 9 ms 208 KB Output is correct
3 Correct 12 ms 340 KB Output is correct
4 Correct 16 ms 356 KB Output is correct
5 Correct 25 ms 360 KB Output is correct
6 Correct 14 ms 208 KB Output is correct
7 Correct 12 ms 208 KB Output is correct
8 Correct 12 ms 208 KB Output is correct
9 Correct 13 ms 328 KB Output is correct
10 Correct 22 ms 352 KB Output is correct
11 Correct 27 ms 380 KB Output is correct
12 Correct 20 ms 368 KB Output is correct
13 Correct 21 ms 356 KB Output is correct
14 Correct 17 ms 256 KB Output is correct
15 Correct 16 ms 256 KB Output is correct
16 Correct 17 ms 212 KB Output is correct
17 Correct 8 ms 220 KB Output is correct
18 Correct 14 ms 304 KB Output is correct
19 Correct 18 ms 360 KB Output is correct
20 Correct 15 ms 380 KB Output is correct
21 Correct 23 ms 208 KB Output is correct
22 Correct 23 ms 236 KB Output is correct
23 Correct 16 ms 212 KB Output is correct
24 Correct 14 ms 296 KB Output is correct
25 Correct 11 ms 220 KB Output is correct
26 Correct 10 ms 336 KB Output is correct
27 Correct 12 ms 344 KB Output is correct
28 Correct 16 ms 328 KB Output is correct
29 Correct 20 ms 340 KB Output is correct
30 Correct 15 ms 464 KB Output is correct
31 Correct 16 ms 340 KB Output is correct
32 Correct 15 ms 256 KB Output is correct
33 Correct 16 ms 208 KB Output is correct
34 Correct 16 ms 208 KB Output is correct
35 Correct 15 ms 304 KB Output is correct
36 Correct 10 ms 208 KB Output is correct
37 Correct 14 ms 336 KB Output is correct
38 Correct 18 ms 340 KB Output is correct
39 Correct 16 ms 336 KB Output is correct
40 Correct 18 ms 336 KB Output is correct
41 Correct 18 ms 348 KB Output is correct
42 Correct 17 ms 336 KB Output is correct
43 Correct 23 ms 380 KB Output is correct
44 Correct 22 ms 348 KB Output is correct
45 Correct 28 ms 368 KB Output is correct
46 Correct 22 ms 356 KB Output is correct
47 Correct 24 ms 504 KB Output is correct
48 Correct 18 ms 396 KB Output is correct
49 Correct 21 ms 364 KB Output is correct
50 Correct 32 ms 376 KB Output is correct
51 Correct 29 ms 364 KB Output is correct
52 Correct 26 ms 364 KB Output is correct
53 Correct 28 ms 492 KB Output is correct
54 Correct 26 ms 368 KB Output is correct
55 Partially correct 25 ms 360 KB Output is partially correct
56 Correct 20 ms 352 KB Output is correct
57 Correct 23 ms 392 KB Output is correct
58 Correct 31 ms 356 KB Output is correct
59 Correct 25 ms 372 KB Output is correct
60 Correct 23 ms 380 KB Output is correct
61 Correct 26 ms 384 KB Output is correct
62 Correct 21 ms 392 KB Output is correct
63 Correct 22 ms 388 KB Output is correct
64 Correct 25 ms 368 KB Output is correct
65 Partially correct 23 ms 336 KB Output is partially correct
66 Partially correct 25 ms 508 KB Output is partially correct
67 Partially correct 27 ms 340 KB Output is partially correct
68 Correct 26 ms 368 KB Output is correct
69 Partially correct 21 ms 364 KB Output is partially correct
70 Partially correct 26 ms 368 KB Output is partially correct
71 Correct 21 ms 348 KB Output is correct
72 Correct 24 ms 360 KB Output is correct
73 Partially correct 27 ms 364 KB Output is partially correct
74 Correct 26 ms 372 KB Output is correct
75 Partially correct 27 ms 352 KB Output is partially correct
76 Partially correct 25 ms 464 KB Output is partially correct
77 Correct 28 ms 372 KB Output is correct
78 Correct 30 ms 364 KB Output is correct
79 Partially correct 24 ms 384 KB Output is partially correct
80 Partially correct 32 ms 352 KB Output is partially correct
81 Partially correct 25 ms 372 KB Output is partially correct
82 Partially correct 27 ms 364 KB Output is partially correct