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Submission #1070394

# Submission time Handle Problem Language Result Execution time Memory
1070394 2024-08-22T13:53:52 Z Plurm Longest Trip (IOI23_longesttrip) C++17
85 / 100
 132 ms 864 KB 
#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;

int dc_left(vector<int> a, vector<int> b) {
    if (a.size() == 1)
        return a.back();
    vector<int> left(a.begin(), a.begin() + a.size() / 2);
    vector<int> right(a.begin() + a.size() / 2, a.end());
    if (are_connected(left, b))
        return dc_left(left, b);
    else
        return dc_left(right, b);
}

int dc_right(vector<int> a, vector<int> b) {
    if (b.size() == 1)
        return b.back();
    vector<int> left(b.begin(), b.begin() + b.size() / 2);
    vector<int> right(b.begin() + b.size() / 2, b.end());
    if (are_connected(a, left))
        return dc_right(a, left);
    else
        return dc_right(a, right);
}

default_random_engine engine;
vector<int> longest_trip(int N, int D) {
    vector<deque<int>> comp(N);
    for (int i = 0; i < N; i++)
        comp[i].push_back(i);
    while (comp.size() > 2) {
        sort(comp.begin(), comp.end(),
             [](auto x, auto y) { return x.size() < y.size(); });
        uniform_int_distribution<int> uid(0, 1);
        if (uid(engine))
            reverse(comp[0].begin(), comp[0].end());
        if (uid(engine))
            reverse(comp[1].begin(), comp[1].end());
        if (uid(engine))
            reverse(comp[2].begin(), comp[2].end());
        vector<int> buf({0, 1, 2});
        shuffle(buf.begin(), buf.end(), engine);
        int i = buf[0];
        int j = buf[1];
        int k = buf[2];
        int u = comp[i].back();
        int v = comp[j].back();
        int w = comp[k].back();
        if (are_connected({v}, {w})) {
            swap(u, w);
            swap(i, k);
        } else if (are_connected({u}, {w})) {
            swap(v, w);
            swap(j, k);
        }
        reverse(comp[j].begin(), comp[j].end());
        comp[i].insert(comp[i].end(), comp[j].begin(), comp[j].end());
        comp.erase(comp.begin() + j);
    }
    if (comp[0].size() < comp[1].size()) {
        swap(comp[0], comp[1]);
    }
    if (are_connected({comp[0].back()}, {comp[1].back()})) {
        reverse(comp[1].begin(), comp[1].end());
        comp[0].insert(comp[0].end(), comp[1].begin(), comp[1].end());
    } else if (are_connected({comp[0].back()}, {comp[1].front()})) {
        comp[0].insert(comp[0].end(), comp[1].begin(), comp[1].end());
    } else if (are_connected({comp[0].front()}, {comp[1].front()})) {
        reverse(comp[0].begin(), comp[0].end());
        comp[0].insert(comp[0].end(), comp[1].begin(), comp[1].end());
    } else if (are_connected({comp[0].front()}, {comp[1].back()})) {
        reverse(comp[0].begin(), comp[0].end());
        reverse(comp[1].begin(), comp[1].end());
        comp[0].insert(comp[0].end(), comp[1].begin(), comp[1].end());
    } else if (are_connected(vector<int>(comp[0].begin(), comp[0].end()),
                             vector<int>(comp[1].begin(), comp[1].end()))) {
        // two cycles, connected
        int l = dc_left(vector<int>(comp[0].begin(), comp[0].end()),
                        vector<int>(comp[1].begin(), comp[1].end()));
        int r = dc_right({l}, vector<int>(comp[1].begin(), comp[1].end()));
        int l_idx = find(comp[0].begin(), comp[0].end(), l) - comp[0].begin();
        int r_idx = find(comp[1].begin(), comp[1].end(), r) - comp[1].begin();
        vector<int> ret;
        for (int i = 0; i < comp[0].size(); i++)
            ret.push_back(comp[0][(l_idx + 1 + i) % comp[0].size()]);
        for (int i = 0; i < comp[1].size(); i++)
            ret.push_back(comp[1][(r_idx + i) % comp[1].size()]);
        return ret;
    }
    return vector<int>(comp[0].begin(), comp[0].end());
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:85:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |         for (int i = 0; i < comp[0].size(); i++)
      |                         ~~^~~~~~~~~~~~~~~~
longesttrip.cpp:87:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   87 |         for (int i = 0; i < comp[1].size(); i++)
      |                         ~~^~~~~~~~~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 18 ms 600 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 17 ms 472 KB Output is correct
4 Correct 40 ms 344 KB Output is correct
5 Correct 115 ms 600 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 344 KB Output is correct
2 Correct 9 ms 344 KB Output is correct
3 Correct 21 ms 344 KB Output is correct
4 Correct 61 ms 344 KB Output is correct
5 Correct 78 ms 600 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 7 ms 344 KB Output is correct
8 Correct 14 ms 468 KB Output is correct
9 Correct 41 ms 344 KB Output is correct
10 Correct 72 ms 600 KB Output is correct
11 Correct 78 ms 600 KB Output is correct
12 Correct 100 ms 600 KB Output is correct
13 Correct 75 ms 608 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 344 KB Output is correct
2 Correct 7 ms 344 KB Output is correct
3 Correct 18 ms 468 KB Output is correct
4 Correct 55 ms 344 KB Output is correct
5 Correct 93 ms 856 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 10 ms 344 KB Output is correct
8 Correct 14 ms 600 KB Output is correct
9 Correct 43 ms 344 KB Output is correct
10 Correct 102 ms 604 KB Output is correct
11 Correct 71 ms 608 KB Output is correct
12 Correct 106 ms 600 KB Output is correct
13 Correct 105 ms 600 KB Output is correct
14 Correct 15 ms 344 KB Output is correct
15 Correct 13 ms 344 KB Output is correct
16 Correct 14 ms 344 KB Output is correct
17 Correct 18 ms 344 KB Output is correct
18 Correct 26 ms 344 KB Output is correct
19 Correct 50 ms 344 KB Output is correct
20 Correct 31 ms 504 KB Output is correct
21 Correct 108 ms 848 KB Output is correct
22 Correct 88 ms 600 KB Output is correct
23 Correct 93 ms 600 KB Output is correct
24 Correct 99 ms 600 KB Output is correct
25 Correct 14 ms 344 KB Output is correct
26 Correct 15 ms 344 KB Output is correct
27 Correct 14 ms 344 KB Output is correct
28 Correct 17 ms 504 KB Output is correct
29 Correct 16 ms 344 KB Output is correct
30 Correct 27 ms 484 KB Output is correct
31 Correct 34 ms 476 KB Output is correct
32 Correct 29 ms 480 KB Output is correct
33 Correct 42 ms 500 KB Output is correct
34 Correct 37 ms 344 KB Output is correct
35 Correct 35 ms 344 KB Output is correct
36 Correct 97 ms 600 KB Output is correct
37 Correct 105 ms 600 KB Output is correct
38 Correct 87 ms 600 KB Output is correct
39 Correct 84 ms 608 KB Output is correct
40 Correct 114 ms 852 KB Output is correct
41 Correct 114 ms 600 KB Output is correct
42 Correct 90 ms 600 KB Output is correct
43 Correct 91 ms 612 KB Output is correct
44 Correct 94 ms 600 KB Output is correct
45 Correct 13 ms 344 KB Output is correct
46 Correct 9 ms 344 KB Output is correct
47 Correct 12 ms 344 KB Output is correct
48 Correct 11 ms 344 KB Output is correct
49 Correct 14 ms 344 KB Output is correct
50 Correct 30 ms 344 KB Output is correct
51 Correct 32 ms 600 KB Output is correct
52 Correct 26 ms 344 KB Output is correct
53 Correct 42 ms 344 KB Output is correct
54 Correct 32 ms 344 KB Output is correct
55 Correct 43 ms 484 KB Output is correct
56 Correct 113 ms 600 KB Output is correct
57 Correct 94 ms 584 KB Output is correct
58 Correct 108 ms 600 KB Output is correct
59 Correct 103 ms 864 KB Output is correct
60 Correct 103 ms 608 KB Output is correct
61 Correct 106 ms 600 KB Output is correct
62 Correct 104 ms 600 KB Output is correct
63 Correct 102 ms 600 KB Output is correct
64 Correct 93 ms 600 KB Output is correct

Subtask #4
45.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 9 ms 344 KB Output is correct
3 Correct 18 ms 448 KB Output is correct
4 Correct 46 ms 344 KB Output is correct
5 Correct 102 ms 600 KB Output is correct
6 Correct 10 ms 344 KB Output is correct
7 Correct 10 ms 344 KB Output is correct
8 Correct 20 ms 472 KB Output is correct
9 Correct 40 ms 504 KB Output is correct
10 Correct 105 ms 600 KB Output is correct
11 Correct 76 ms 600 KB Output is correct
12 Correct 111 ms 600 KB Output is correct
13 Correct 85 ms 600 KB Output is correct
14 Correct 16 ms 344 KB Output is correct
15 Correct 14 ms 344 KB Output is correct
16 Correct 16 ms 344 KB Output is correct
17 Correct 14 ms 344 KB Output is correct
18 Correct 20 ms 344 KB Output is correct
19 Correct 49 ms 344 KB Output is correct
20 Correct 40 ms 344 KB Output is correct
21 Correct 16 ms 344 KB Output is correct
22 Correct 12 ms 344 KB Output is correct
23 Correct 10 ms 344 KB Output is correct
24 Correct 10 ms 344 KB Output is correct
25 Correct 8 ms 344 KB Output is correct
26 Correct 19 ms 344 KB Output is correct
27 Correct 30 ms 344 KB Output is correct
28 Correct 20 ms 344 KB Output is correct
29 Correct 34 ms 596 KB Output is correct
30 Correct 49 ms 344 KB Output is correct
31 Correct 42 ms 600 KB Output is correct
32 Correct 13 ms 344 KB Output is correct
33 Correct 11 ms 344 KB Output is correct
34 Correct 15 ms 344 KB Output is correct
35 Correct 11 ms 344 KB Output is correct
36 Correct 9 ms 344 KB Output is correct
37 Correct 28 ms 340 KB Output is correct
38 Correct 22 ms 344 KB Output is correct
39 Correct 28 ms 344 KB Output is correct
40 Correct 37 ms 344 KB Output is correct
41 Correct 41 ms 340 KB Output is correct
42 Correct 32 ms 344 KB Output is correct
43 Correct 79 ms 600 KB Output is correct
44 Correct 75 ms 600 KB Output is correct
45 Correct 75 ms 856 KB Output is correct
46 Correct 87 ms 600 KB Output is correct
47 Correct 82 ms 600 KB Output is correct
48 Correct 88 ms 600 KB Output is correct
49 Correct 110 ms 600 KB Output is correct
50 Correct 97 ms 600 KB Output is correct
51 Correct 102 ms 600 KB Output is correct
52 Correct 115 ms 600 KB Output is correct
53 Correct 99 ms 592 KB Output is correct
54 Correct 95 ms 600 KB Output is correct
55 Correct 128 ms 600 KB Output is correct
56 Correct 94 ms 600 KB Output is correct
57 Correct 75 ms 600 KB Output is correct
58 Correct 118 ms 600 KB Output is correct
59 Correct 115 ms 600 KB Output is correct
60 Correct 122 ms 600 KB Output is correct
61 Correct 93 ms 600 KB Output is correct
62 Correct 93 ms 600 KB Output is correct
63 Correct 113 ms 612 KB Output is correct
64 Correct 132 ms 600 KB Output is correct
65 Partially correct 104 ms 600 KB Output is partially correct
66 Partially correct 92 ms 612 KB Output is partially correct
67 Partially correct 82 ms 612 KB Output is partially correct
68 Partially correct 114 ms 600 KB Output is partially correct
69 Partially correct 75 ms 600 KB Output is partially correct
70 Partially correct 79 ms 600 KB Output is partially correct
71 Correct 109 ms 600 KB Output is correct
72 Correct 75 ms 604 KB Output is correct
73 Partially correct 76 ms 856 KB Output is partially correct
74 Partially correct 120 ms 600 KB Output is partially correct
75 Partially correct 115 ms 600 KB Output is partially correct
76 Partially correct 93 ms 612 KB Output is partially correct
77 Correct 86 ms 600 KB Output is correct
78 Correct 88 ms 852 KB Output is correct
79 Correct 80 ms 344 KB Output is correct
80 Partially correct 89 ms 600 KB Output is partially correct
81 Partially correct 80 ms 856 KB Output is partially correct
82 Partially correct 131 ms 600 KB Output is partially correct