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Submission #965229

# Submission time Handle Problem Language Result Execution time Memory
965229 2024-04-18T08:40:55 Z Pannda Fun Tour (APIO20_fun) C++17
47 / 100
 107 ms 15824 KB 
#include "fun.h"

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

vector<int> createFunTour(int n, int _400000) {
    if (n <= 500) {
        auto findFurthest = [&](int u, set<int> dom) {
            int v = u;
            int dv = 0;
            for (int x : dom) {
                int dx = hoursRequired(u, x);
                if (dx > dv) {
                    v = x;
                    dv = dx;
                }
            }
            return v;
        };
        set<int> rem;
        for (int u = 0; u < n; u++) rem.insert(u);
        int u = findFurthest(0, rem);
        vector<int> res;
        for (int i = 0; i < n; i++) {
            res.push_back(u);
            rem.erase(u);
            u = findFurthest(u, rem);
        }
        return res;
    }

    int centroid = [&]() -> int {
        int res = 0;
        int siz = n;
        for (int v = 0; v < n; v++) {
            int get = attractionsBehind(0, v);
            if (get > n / 2 && get < siz) {
                res = v;
                siz = get;
            }
        }
        return res;
    }();
    vector<int> dist(n);
    for (int u = 0; u < n; u++) dist[u] = hoursRequired(centroid, u);

    int d0 = max_element(dist.begin(), dist.end()) - dist.begin();
    vector<int> dist0(n);
    for (int u = 0; u < n; u++) dist0[u] = hoursRequired(d0, u);

    int d1 = max_element(dist0.begin(), dist0.end()) - dist0.begin();
    vector<int> dist1(n);
    for (int u = 0; u < n; u++) dist1[u] = hoursRequired(d1, u);

    array<vector<int>, 3> dom;
    for (int u = 0; u < n; u++) {
        if (u == centroid) continue;
        if (dist0[u] == dist[u] + dist[d0] && dist1[u] == dist[u] + dist[d1]) {
            dom[2].push_back(u);
        } else if (dist0[u] == dist[u] + dist[d0]) {
            dom[1].push_back(u);
        } else {
            dom[0].push_back(u);
        }
    }
    for (int i = 0; i < 3; i++) {
        sort(dom[i].begin(), dom[i].end(), [&](int u, int v) { return dist[u] > dist[v]; });
    }
    vector<int> order = {0, 1, 2};
    sort(order.begin(), order.end(), [&](int i, int j) { return dom[i].size() < dom[j].size(); });

    vector<int> res = { centroid };

    int last = -1;
    while (dom[order[2]].size() < dom[order[0]].size() + dom[order[1]].size()) {
        int i0;
        int d = n;
        for (int ii = 2; ii >= 0; ii--) {
            int i = order[ii];
            if (i == last) continue;
            if (dom[i].empty()) continue;
            if (dist[res.back()] + dist[dom[i].back()] < d) {
                d = dist[res.back()] + dist[dom[i].back()];
                i0 = i;
            }
        }
        res.push_back(dom[i0].back());
        dom[i0].pop_back();
        last = i0;
        sort(order.begin(), order.end(), [&](int i, int j) { return dom[i].size() < dom[j].size(); });
    }

    int first = 3;

    bool big = last != order[2];
    while (res.size() < n) {
        int i0;
        if (big) {
            i0 = order[2];
        } else {
            if (dom[order[0]].empty()) i0 = order[1];
            else if (dom[order[1]].empty()) i0 = order[0];
            else i0 = dist[dom[order[0]].back()] < dist[dom[order[1]].back()] ? order[0] : order[1];
        }
        res.push_back(dom[i0].back());
        if (first > 0 && res.size() >= 3) {
            assert(dist[res.end()[-1]] + dist[res.end()[-2]] >= dist[res.end()[-2]] + dist[res.end()[-3]]);
            first--;
        }
        dom[i0].pop_back();
        big = !big;
    }

    reverse(res.begin(), res.end());
    return res;
}

Compilation message

fun.cpp: In function 'std::vector<int> createFunTour(int, int)':
fun.cpp:96:23: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   96 |     while (res.size() < n) {
      |            ~~~~~~~~~~~^~~
fun.cpp:95:31: warning: 'i0' may be used uninitialized in this function [-Wmaybe-uninitialized]
   95 |     bool big = last != order[2];
      |                               ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 344 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 0 ms 344 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 11 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 2 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 11 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 2 ms 348 KB Output is correct
32 Correct 4 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 12 ms 348 KB Output is correct
35 Correct 12 ms 500 KB Output is correct
36 Correct 14 ms 528 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 11 ms 348 KB Output is correct
39 Correct 3 ms 348 KB Output is correct
40 Correct 5 ms 348 KB Output is correct
41 Correct 2 ms 348 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 11 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 2 ms 348 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 107 ms 15824 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 2 ms 604 KB Output is correct
21 Correct 4 ms 600 KB Output is correct
22 Correct 5 ms 1372 KB Output is correct
23 Correct 9 ms 2364 KB Output is correct
24 Correct 13 ms 3036 KB Output is correct
25 Correct 61 ms 9076 KB Output is correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 11 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 2 ms 348 KB Output is correct
11 Correct 4 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Runtime error 2 ms 612 KB Execution killed with signal 6
14 Halted 0 ms 0 KB -

Subtask #5
0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 0 ms 344 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 11 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 2 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 11 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 2 ms 348 KB Output is correct
32 Correct 4 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 12 ms 348 KB Output is correct
35 Correct 12 ms 500 KB Output is correct
36 Correct 14 ms 528 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 11 ms 348 KB Output is correct
39 Correct 3 ms 348 KB Output is correct
40 Correct 5 ms 348 KB Output is correct
41 Correct 2 ms 348 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 1 ms 348 KB Output is correct
44 Correct 107 ms 15824 KB Output is correct
45 Correct 1 ms 348 KB Output is correct
46 Correct 2 ms 604 KB Output is correct
47 Correct 4 ms 600 KB Output is correct
48 Correct 5 ms 1372 KB Output is correct
49 Correct 9 ms 2364 KB Output is correct
50 Correct 13 ms 3036 KB Output is correct
51 Correct 61 ms 9076 KB Output is correct
52 Runtime error 2 ms 612 KB Execution killed with signal 6
53 Halted 0 ms 0 KB -