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답안 #1070610

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1070610 2024-08-22T15:58:57 Z Plurm 가장 긴 여행 (IOI23_longesttrip) C++17
85 / 100
 120 ms 856 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);
}

void join(vector<deque<int>> &comp, int u, int v) {
    int a = -1;
    int b = -1;
    for (int i = 0; i < comp.size(); i++) {
        if (!comp[i].empty()) {
            if (comp[i].front() == u) {
                reverse(comp[i].begin(), comp[i].end());
                a = i;
            } else if (comp[i].back() == u) {
                a = i;
            }
            if (comp[i].front() == v) {
                b = i;
            } else if (comp[i].back() == v) {
                reverse(comp[i].begin(), comp[i].end());
                b = i;
            }
        }
    }
    comp[a].insert(comp[a].end(), comp[b].begin(), comp[b].end());
    comp.erase(comp.begin() + b);
}

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);
    set<pair<int, int>> known;
    while (comp.size() > 2) {
        sort(comp.begin(), comp.end(),
             [](auto x, auto y) { return x.size() < y.size(); });
        int i = 0;
        int j = 1;
        int k = 2;
        int u = comp[i].back();
        int v = comp[j].back();
        int w = comp[k].back();
        if (!known.count(minmax(v, w)) && are_connected({v}, {w})) {
            join(comp, v, w);
        } else if (!known.count(minmax(u, v)) && are_connected({u}, {v})) {
            known.insert(minmax(v, w));
            join(comp, u, v);
        } else {
            known.insert(minmax(u, v));
            known.insert(minmax(v, w));
            join(comp, u, w);
        }
    }
    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 'void join(std::vector<std::deque<int> >&, int, int)':
longesttrip.cpp:30:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::deque<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for (int i = 0; i < comp.size(); i++) {
      |                     ~~^~~~~~~~~~~~~
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:99:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   99 |         for (int i = 0; i < comp[0].size(); i++)
      |                         ~~^~~~~~~~~~~~~~~~
longesttrip.cpp:101:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  101 |         for (int i = 0; i < comp[1].size(); i++)
      |                         ~~^~~~~~~~~~~~~~~~

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 35 ms 600 KB Output is correct

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 344 KB Output is correct
2 Correct 7 ms 344 KB Output is correct
3 Correct 17 ms 344 KB Output is correct
4 Correct 37 ms 344 KB Output is correct
5 Correct 75 ms 608 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 15 ms 344 KB Output is correct
4 Correct 36 ms 344 KB Output is correct
5 Correct 91 ms 600 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 10 ms 344 KB Output is correct
8 Correct 25 ms 344 KB Output is correct
9 Correct 28 ms 344 KB Output is correct
10 Correct 80 ms 600 KB Output is correct
11 Correct 115 ms 600 KB Output is correct
12 Correct 74 ms 600 KB Output is correct
13 Correct 109 ms 600 KB Output is correct

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 7 ms 344 KB Output is correct
3 Correct 19 ms 344 KB Output is correct
4 Correct 53 ms 344 KB Output is correct
5 Correct 79 ms 600 KB Output is correct
6 Correct 12 ms 344 KB Output is correct
7 Correct 8 ms 344 KB Output is correct
8 Correct 15 ms 344 KB Output is correct
9 Correct 29 ms 344 KB Output is correct
10 Correct 110 ms 600 KB Output is correct
11 Correct 81 ms 600 KB Output is correct
12 Correct 84 ms 600 KB Output is correct
13 Correct 109 ms 600 KB Output is correct
14 Correct 13 ms 344 KB Output is correct
15 Correct 15 ms 344 KB Output is correct
16 Correct 9 ms 344 KB Output is correct
17 Correct 12 ms 344 KB Output is correct
18 Correct 18 ms 600 KB Output is correct
19 Correct 47 ms 344 KB Output is correct
20 Correct 49 ms 344 KB Output is correct
21 Correct 88 ms 600 KB Output is correct
22 Correct 104 ms 600 KB Output is correct
23 Correct 77 ms 600 KB Output is correct
24 Correct 87 ms 600 KB Output is correct
25 Correct 16 ms 340 KB Output is correct
26 Correct 11 ms 344 KB Output is correct
27 Correct 9 ms 344 KB Output is correct
28 Correct 9 ms 344 KB Output is correct
29 Correct 10 ms 344 KB Output is correct
30 Correct 18 ms 480 KB Output is correct
31 Correct 20 ms 476 KB Output is correct
32 Correct 20 ms 344 KB Output is correct
33 Correct 50 ms 344 KB Output is correct
34 Correct 29 ms 344 KB Output is correct
35 Correct 34 ms 344 KB Output is correct
36 Correct 79 ms 600 KB Output is correct
37 Correct 95 ms 600 KB Output is correct
38 Correct 109 ms 600 KB Output is correct
39 Correct 76 ms 600 KB Output is correct
40 Correct 77 ms 600 KB Output is correct
41 Correct 98 ms 600 KB Output is correct
42 Correct 82 ms 600 KB Output is correct
43 Correct 85 ms 600 KB Output is correct
44 Correct 84 ms 600 KB Output is correct
45 Correct 9 ms 344 KB Output is correct
46 Correct 8 ms 344 KB Output is correct
47 Correct 10 ms 344 KB Output is correct
48 Correct 12 ms 344 KB Output is correct
49 Correct 11 ms 344 KB Output is correct
50 Correct 19 ms 344 KB Output is correct
51 Correct 35 ms 344 KB Output is correct
52 Correct 27 ms 484 KB Output is correct
53 Correct 29 ms 344 KB Output is correct
54 Correct 49 ms 504 KB Output is correct
55 Correct 29 ms 344 KB Output is correct
56 Correct 77 ms 600 KB Output is correct
57 Correct 108 ms 600 KB Output is correct
58 Correct 87 ms 600 KB Output is correct
59 Correct 79 ms 600 KB Output is correct
60 Correct 81 ms 600 KB Output is correct
61 Correct 120 ms 600 KB Output is correct
62 Correct 82 ms 856 KB Output is correct
63 Correct 84 ms 600 KB Output is correct
64 Correct 79 ms 600 KB Output is correct

Subtask #4
45.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 20 ms 344 KB Output is correct
4 Correct 34 ms 344 KB Output is correct
5 Correct 85 ms 600 KB Output is correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 7 ms 344 KB Output is correct
8 Correct 15 ms 344 KB Output is correct
9 Correct 28 ms 344 KB Output is correct
10 Correct 98 ms 612 KB Output is correct
11 Correct 102 ms 600 KB Output is correct
12 Correct 111 ms 608 KB Output is correct
13 Correct 76 ms 600 KB Output is correct
14 Correct 12 ms 344 KB Output is correct
15 Correct 9 ms 344 KB Output is correct
16 Correct 9 ms 344 KB Output is correct
17 Correct 12 ms 340 KB Output is correct
18 Correct 25 ms 344 KB Output is correct
19 Correct 28 ms 344 KB Output is correct
20 Correct 28 ms 344 KB Output is correct
21 Correct 15 ms 344 KB Output is correct
22 Correct 15 ms 344 KB Output is correct
23 Correct 9 ms 344 KB Output is correct
24 Correct 9 ms 344 KB Output is correct
25 Correct 9 ms 344 KB Output is correct
26 Correct 19 ms 344 KB Output is correct
27 Correct 19 ms 344 KB Output is correct
28 Correct 20 ms 344 KB Output is correct
29 Correct 31 ms 344 KB Output is correct
30 Correct 28 ms 344 KB Output is correct
31 Correct 32 ms 344 KB Output is correct
32 Correct 8 ms 344 KB Output is correct
33 Correct 8 ms 344 KB Output is correct
34 Correct 13 ms 344 KB Output is correct
35 Correct 10 ms 344 KB Output is correct
36 Correct 10 ms 344 KB Output is correct
37 Correct 20 ms 344 KB Output is correct
38 Correct 21 ms 484 KB Output is correct
39 Correct 21 ms 480 KB Output is correct
40 Correct 30 ms 344 KB Output is correct
41 Correct 38 ms 508 KB Output is correct
42 Correct 28 ms 344 KB Output is correct
43 Correct 76 ms 600 KB Output is correct
44 Correct 76 ms 600 KB Output is correct
45 Correct 75 ms 600 KB Output is correct
46 Correct 82 ms 856 KB Output is correct
47 Correct 75 ms 600 KB Output is correct
48 Correct 80 ms 600 KB Output is correct
49 Correct 85 ms 612 KB Output is correct
50 Correct 77 ms 600 KB Output is correct
51 Correct 79 ms 600 KB Output is correct
52 Partially correct 82 ms 600 KB Output is partially correct
53 Correct 84 ms 600 KB Output is correct
54 Correct 82 ms 608 KB Output is correct
55 Correct 82 ms 852 KB Output is correct
56 Correct 78 ms 616 KB Output is correct
57 Correct 79 ms 600 KB Output is correct
58 Correct 80 ms 600 KB Output is correct
59 Correct 88 ms 600 KB Output is correct
60 Correct 77 ms 600 KB Output is correct
61 Correct 76 ms 600 KB Output is correct
62 Correct 79 ms 600 KB Output is correct
63 Correct 76 ms 600 KB Output is correct
64 Correct 80 ms 600 KB Output is correct
65 Partially correct 78 ms 600 KB Output is partially correct
66 Partially correct 78 ms 600 KB Output is partially correct
67 Partially correct 77 ms 600 KB Output is partially correct
68 Correct 80 ms 612 KB Output is correct
69 Partially correct 78 ms 600 KB Output is partially correct
70 Partially correct 78 ms 600 KB Output is partially correct
71 Correct 85 ms 600 KB Output is correct
72 Correct 85 ms 600 KB Output is correct
73 Correct 78 ms 600 KB Output is correct
74 Partially correct 79 ms 856 KB Output is partially correct
75 Partially correct 77 ms 600 KB Output is partially correct
76 Partially correct 86 ms 600 KB Output is partially correct
77 Correct 77 ms 600 KB Output is correct
78 Correct 78 ms 600 KB Output is correct
79 Correct 78 ms 600 KB Output is correct
80 Partially correct 88 ms 848 KB Output is partially correct
81 Partially correct 91 ms 600 KB Output is partially correct
82 Partially correct 77 ms 600 KB Output is partially correct