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Submission #965270

# Submission time Handle Problem Language Result Execution time Memory
965270 2024-04-18T09:13:15 Z Pannda Fun Tour (APIO20_fun) C++17
47 / 100
 115 ms 15960 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(); });
    }

    bool first = true;

    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) {
            assert(dist[res.end()[-1]] + dist[res.end()[-2]] >= dist[res.end()[-2]] + dist[res.end()[-3]]);
            first = false;
        }
        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 0 ms 600 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 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 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 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 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 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 0 ms 600 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 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 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 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 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 10 ms 528 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 2 ms 344 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 12 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 3 ms 348 KB Output is correct
33 Correct 2 ms 344 KB Output is correct
34 Correct 9 ms 348 KB Output is correct
35 Correct 12 ms 344 KB Output is correct
36 Correct 15 ms 344 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 11 ms 528 KB Output is correct
39 Correct 4 ms 344 KB Output is correct
40 Correct 6 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 0 ms 600 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 10 ms 528 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 115 ms 15960 KB Output is correct
19 Correct 2 ms 344 KB Output is correct
20 Correct 2 ms 604 KB Output is correct
21 Correct 3 ms 604 KB Output is correct
22 Correct 6 ms 1368 KB Output is correct
23 Correct 10 ms 2396 KB Output is correct
24 Correct 14 ms 2908 KB Output is correct
25 Correct 80 ms 9068 KB Output is correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 600 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 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 12 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 3 ms 348 KB Output is correct
12 Correct 2 ms 344 KB Output is correct
13 Incorrect 1 ms 344 KB Tour is not fun
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 0 ms 600 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 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 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 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 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 10 ms 528 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 2 ms 344 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 12 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 3 ms 348 KB Output is correct
33 Correct 2 ms 344 KB Output is correct
34 Correct 9 ms 348 KB Output is correct
35 Correct 12 ms 344 KB Output is correct
36 Correct 15 ms 344 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 11 ms 528 KB Output is correct
39 Correct 4 ms 344 KB Output is correct
40 Correct 6 ms 348 KB Output is correct
41 Correct 2 ms 348 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 1 ms 348 KB Output is correct
44 Correct 115 ms 15960 KB Output is correct
45 Correct 2 ms 344 KB Output is correct
46 Correct 2 ms 604 KB Output is correct
47 Correct 3 ms 604 KB Output is correct
48 Correct 6 ms 1368 KB Output is correct
49 Correct 10 ms 2396 KB Output is correct
50 Correct 14 ms 2908 KB Output is correct
51 Correct 80 ms 9068 KB Output is correct
52 Incorrect 1 ms 344 KB Tour is not fun
53 Halted 0 ms 0 KB -