oj.uz

Submission #853989

# Submission time Handle Problem Language Result Execution time Memory
853989 2023-09-25T18:28:00 Z FairyWinx Longest Trip (IOI23_longesttrip) C++17
70 / 100
 17 ms 960 KB 
#include <bits/stdc++.h>
#ifndef LOCAL
    #include "longesttrip.h"
#endif

#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()

using namespace std;

#ifdef LOCAL
vector<vector<int>> G_secret;
int n;
int count_query = 0;

bool are_connected(vector<int> a, vector<int> b) {
    ++count_query;
    for (int i : a) {
        for (int j : b) {
            if (G_secret[i][j])
                return true;
        }
    }
    return false;
}
#endif

struct dsu {
    vector<int> p;

    dsu(int n) {
        p.resize(n);
        iota(all(p), 0);
    }

    int get(int a) {
        if (p[a] == a)
            return a;
        return p[a] = get(p[a]);
    }

    void merge(int a, int b) {
        a = get(a), b = get(b);
        p[a] = b;
    }
};

vector<int> get_comp(int n, int v, dsu &d) {
    vector<int> comp;
    for (int i = 0; i < n; ++i) {
        if (d.get(i) == v) {
            comp.push_back(i);
        }
    }
    return comp;
}

void add_comp(vector<int> &ans, vector<int> &comp, pair<int, int> end) {
    ans.push_back(end.first);
    for (int j : comp) {
        if (j != end.first && j != end.second) {
            ans.push_back(j);
        }
    }
    if (end.first != end.second) {
        ans.push_back(end.second);
    }
}

vector<int> longest_trip(int n, int D) { // Случай, когда отдельная вершинка - 0
    dsu d(n);
    vector<vector<int>> path;
    vector<pair<int, int>> ends;
    ends.push_back({0, 0});
    path.push_back({0});
    vector<int> ost(n - 1);
    iota(all(ost), 1);
    while (true) {
        int ind_comp = ost[0];
        bool find = false;
        bool was_merge = false;
        for (int i = 0; i < (int) ost.size(); ++i) {
            if (are_connected({ends.back().second}, get_comp(n, ost[i], d))) {
                path.push_back(get_comp(n, ost[i], d));
                int last_end = ends.back().second;
                ends.emplace_back();

                {
                    int L = -1, R = (int) path.back().size() - 1;
                    while (R - L > 1) {
                        // cout << L << ' ' << R << "!\n";
                        int mid = (R + L) / 2;
                        vector<int> tmp;
                        for (int j = 0; j <= mid; ++j) {
                            tmp.push_back(path.back()[j]);
                        }
                        if (tmp.size() && are_connected({last_end}, tmp)) {
                            R = mid;
                        } else {
                            L = mid;
                        }
                    }
                    ends.back().first = path.back()[R];
                    // cout << "! " << path.back()[R] << ':';
                }

                // for (int i : path.back()) { // поиск вершины.
                //     if (are_connected({last_end}, {i})) {
                //         ends.back().first = i;
                //     }
                // }
                if (path.back().size() == 1) {
                    ends.back().second = ends.back().first;
                } else {
                    if (ends.back().first != path.back()[0]) {
                        ends.back().second = path.back()[0];
                    } else {
                        ends.back().second = path.back().back();
                    }
                }
                swap(ost[i], ost.back());
                ost.pop_back();
                find = true;
                break;
            } else {
                was_merge = true;
                d.merge(ost[i], ind_comp);
                swap(ost[i], ost.back());
                ost.pop_back();
                --i;
            }
        }
        if (was_merge)
            ost.push_back(ind_comp);
        if (!ost.size()) {
            vector<int> ans;
            for (int i = 0; i < (int) path.size(); ++i) {
                add_comp(ans, path[i], ends[i]);
            }
            // cout << "MEOW1\n";
            return ans;
        }
        if (!find) {
            vector<int> last_comp = get_comp(n, ost[0], d);
            int V = -1;
            vector<int> ost_graph;
            for (auto i : path) {
                for (int j : i) {
                    ost_graph.push_back(j);
                }
            }
            for (int i : last_comp) {
                if (are_connected({i}, ost_graph)) {
                    V = i;
                    break;
                }
            }
            if (V == -1) {
                vector<int> ans;
                if (last_comp.size() > n - last_comp.size()) {
                    for (int i : last_comp)
                        ans.push_back(i);
                } else {
                    for (auto i : path) {
                        for (int j : i)
                            ans.push_back(j);
                    }
                }
                return ans;
            }
            for (int i = 0; i < (int) path.size(); ++i) {
                if (are_connected({V}, {ends[i].first})) {
                    vector<int> ans;
                    for (int j : last_comp) {
                        if (j != V) {
                            ans.push_back(j);
                        }
                    }
                    ans.push_back(V);
                    for (int j = i; j < (int) path.size(); ++j) {
                        add_comp(ans, path[j], ends[j]);
                    }
                    for (int j = 0; j < i; ++j) {
                        add_comp(ans, path[j], ends[j]);
                    }
                    // cout << "MEOW2\n";
                    return ans;
                }
            }
        }
    }
    assert(0);
    return {-1};
}

#ifdef LOCAL

int main()
{
    int t;
    cin >> t;
    while (t--) {
        count_query = 0;
        int n, d;
        cin >> n >> d;
        G_secret.clear();
        G_secret.resize(n, vector<int> (n));
        for (int i = 0; i < n; ++i) {
            for (int j = 0; j < i; ++j) {
                cin >> G_secret[i][j];
                G_secret[j][i] = G_secret[i][j];
            }
        }
        cout << "MEOW\n";
        auto res = longest_trip(n, d);
        cout << res.size() << '\n';
        // for (int i : res)
        //     cout << i << ' ';
        cout << '\n';
        cout << count_query << '\n';
        // vector<int> p(n);
        // iota(all(p), 0);
        // int ans = 0;
        // do {
        //     for (int i = 1; i <= n; ++i) {
        //         bool valid = true;
        //         for (int j = 0; j < i - 1; ++j) {
        //             if (!G_secret[p[j]][p[j + 1]]) {
        //                 valid = false;
        //             }
        //         }
        //         if (valid) {
        //             ans = max(ans, i);
        //         }
        //     }
        // } while (next_permutation(all(p)));
        // if (res.size() != ans) {
        //     cout << "Попався\n";
        //     cout << n << ' ' << d << '\n';
        //     for (int i = 1; i < n; ++i) {
        //         for (int j = 0; j < i; ++j) {
        //             cout << G_secret[i][j] << ' ';
        //         }
        //         cout << '\n';
        //     }
        //     for (int i : res)
        //         cout << i << ' ';
        //     cout << '\n';
        //     cout << "! " << ans << '\n';
        //     return 0;
        // }
    }

    return 0;
}

#endif

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 2 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 6 ms 344 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 6 ms 600 KB Output is correct
5 Correct 5 ms 600 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 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 6 ms 344 KB Output is correct
6 Correct 8 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 344 KB Output is correct
11 Correct 6 ms 344 KB Output is correct
12 Correct 6 ms 344 KB Output is correct
13 Correct 6 ms 600 KB Output is correct

Subtask #3
25.0 / 25.0

# 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 5 ms 344 KB Output is correct
4 Correct 5 ms 856 KB Output is correct
5 Correct 6 ms 600 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 9 ms 344 KB Output is correct
8 Correct 5 ms 344 KB Output is correct
9 Correct 5 ms 440 KB Output is correct
10 Correct 6 ms 344 KB Output is correct
11 Correct 5 ms 344 KB Output is correct
12 Correct 6 ms 600 KB Output is correct
13 Correct 6 ms 600 KB Output is correct
14 Correct 8 ms 344 KB Output is correct
15 Correct 8 ms 344 KB Output is correct
16 Correct 7 ms 344 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 6 ms 344 KB Output is correct
19 Correct 6 ms 344 KB Output is correct
20 Correct 6 ms 344 KB Output is correct
21 Correct 7 ms 344 KB Output is correct
22 Correct 6 ms 344 KB Output is correct
23 Correct 7 ms 600 KB Output is correct
24 Correct 8 ms 600 KB Output is correct
25 Correct 9 ms 344 KB Output is correct
26 Correct 7 ms 344 KB Output is correct
27 Correct 6 ms 344 KB Output is correct
28 Correct 7 ms 344 KB Output is correct
29 Correct 6 ms 344 KB Output is correct
30 Correct 6 ms 432 KB Output is correct
31 Correct 9 ms 436 KB Output is correct
32 Correct 10 ms 436 KB Output is correct
33 Correct 6 ms 344 KB Output is correct
34 Correct 7 ms 600 KB Output is correct
35 Correct 9 ms 856 KB Output is correct
36 Correct 7 ms 344 KB Output is correct
37 Correct 10 ms 856 KB Output is correct
38 Correct 11 ms 600 KB Output is correct
39 Correct 16 ms 704 KB Output is correct
40 Correct 16 ms 456 KB Output is correct
41 Correct 15 ms 452 KB Output is correct
42 Correct 16 ms 452 KB Output is correct
43 Correct 15 ms 696 KB Output is correct
44 Correct 15 ms 948 KB Output is correct
45 Correct 7 ms 344 KB Output is correct
46 Correct 7 ms 344 KB Output is correct
47 Correct 8 ms 344 KB Output is correct
48 Correct 7 ms 344 KB Output is correct
49 Correct 9 ms 344 KB Output is correct
50 Correct 6 ms 436 KB Output is correct
51 Correct 7 ms 436 KB Output is correct
52 Correct 8 ms 436 KB Output is correct
53 Correct 8 ms 600 KB Output is correct
54 Correct 7 ms 600 KB Output is correct
55 Correct 8 ms 856 KB Output is correct
56 Correct 8 ms 604 KB Output is correct
57 Correct 8 ms 456 KB Output is correct
58 Correct 9 ms 700 KB Output is correct
59 Correct 13 ms 700 KB Output is correct
60 Correct 9 ms 704 KB Output is correct
61 Correct 9 ms 708 KB Output is correct
62 Correct 10 ms 948 KB Output is correct
63 Correct 12 ms 864 KB Output is correct
64 Correct 12 ms 956 KB Output is correct

Subtask #4
30.0 / 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 5 ms 344 KB Output is correct
4 Correct 5 ms 448 KB Output is correct
5 Correct 6 ms 344 KB Output is correct
6 Correct 10 ms 344 KB Output is correct
7 Correct 7 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 5 ms 344 KB Output is correct
11 Correct 6 ms 344 KB Output is correct
12 Correct 6 ms 344 KB Output is correct
13 Correct 6 ms 344 KB Output is correct
14 Correct 8 ms 344 KB Output is correct
15 Correct 7 ms 344 KB Output is correct
16 Correct 6 ms 344 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 6 ms 344 KB Output is correct
19 Correct 6 ms 344 KB Output is correct
20 Correct 6 ms 344 KB Output is correct
21 Correct 8 ms 344 KB Output is correct
22 Correct 8 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 436 KB Output is correct
27 Correct 10 ms 440 KB Output is correct
28 Correct 9 ms 436 KB Output is correct
29 Correct 7 ms 344 KB Output is correct
30 Correct 8 ms 856 KB Output is correct
31 Correct 7 ms 344 KB Output is correct
32 Correct 7 ms 344 KB Output is correct
33 Correct 10 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 10 ms 344 KB Output is correct
37 Correct 7 ms 436 KB Output is correct
38 Correct 8 ms 688 KB Output is correct
39 Correct 8 ms 432 KB Output is correct
40 Correct 8 ms 600 KB Output is correct
41 Correct 8 ms 600 KB Output is correct
42 Correct 11 ms 600 KB Output is correct
43 Correct 6 ms 596 KB Output is correct
44 Correct 7 ms 344 KB Output is correct
45 Correct 6 ms 600 KB Output is correct
46 Correct 6 ms 344 KB Output is correct
47 Correct 8 ms 344 KB Output is correct
48 Correct 9 ms 596 KB Output is correct
49 Partially correct 14 ms 856 KB Output is partially correct
50 Partially correct 15 ms 856 KB Output is partially correct
51 Partially correct 17 ms 612 KB Output is partially correct
52 Partially correct 15 ms 444 KB Output is partially correct
53 Partially correct 15 ms 696 KB Output is partially correct
54 Partially correct 15 ms 460 KB Output is partially correct
55 Partially correct 15 ms 704 KB Output is partially correct
56 Correct 9 ms 344 KB Output is correct
57 Partially correct 13 ms 856 KB Output is partially correct
58 Partially correct 14 ms 708 KB Output is partially correct
59 Partially correct 14 ms 696 KB Output is partially correct
60 Partially correct 15 ms 696 KB Output is partially correct
61 Partially correct 15 ms 444 KB Output is partially correct
62 Partially correct 8 ms 460 KB Output is partially correct
63 Partially correct 9 ms 604 KB Output is partially correct
64 Partially correct 9 ms 444 KB Output is partially correct
65 Partially correct 12 ms 860 KB Output is partially correct
66 Correct 9 ms 452 KB Output is correct
67 Partially correct 11 ms 708 KB Output is partially correct
68 Correct 10 ms 960 KB Output is correct
69 Partially correct 15 ms 708 KB Output is partially correct
70 Partially correct 12 ms 956 KB Output is partially correct
71 Partially correct 11 ms 856 KB Output is partially correct
72 Partially correct 11 ms 860 KB Output is partially correct
73 Partially correct 13 ms 616 KB Output is partially correct
74 Partially correct 12 ms 960 KB Output is partially correct
75 Partially correct 12 ms 692 KB Output is partially correct
76 Partially correct 12 ms 692 KB Output is partially correct
77 Partially correct 10 ms 600 KB Output is partially correct
78 Correct 8 ms 704 KB Output is correct
79 Partially correct 10 ms 608 KB Output is partially correct
80 Partially correct 11 ms 452 KB Output is partially correct
81 Partially correct 13 ms 452 KB Output is partially correct
82 Partially correct 13 ms 448 KB Output is partially correct