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Submission #846584

# Submission time Handle Problem Language Result Execution time Memory
846584 2023-09-08T02:58:32 Z math_rabbit_1028 Longest Trip (IOI23_longesttrip) C++17
70 / 100
 68 ms 1768 KB 
#include <bits/stdc++.h>
#include "longesttrip.h"
using namespace std;

int find_connected(int v, vector<int> arr) {
    if (arr.size() == 0 || !are_connected({v}, arr)) return -1;

    int s = 0, e = arr.size() - 1;
    while (s < e) {
        int m = (s + e) / 2;
        vector<int> temp;
        for (int i = s; i <= m; i++) temp.push_back(arr[i]);
        if (are_connected({v}, temp)) e = m;
        else s = m + 1;
    }
    return arr[s];
}

vector<int> longest_trip(int N, int D) {
    int n = N; 
    vector<int> res;

    int ch[256]; for (int i = 0; i < n; i++) ch[i] = 0;
    vector<int> path, clique;
    path.push_back(0);
    ch[0] = 1;
    while (true) {
        vector<int> temp;
        for (int i = 0; i < n; i++) if (ch[i] == 0) temp.push_back(i);
        int v = find_connected(path.back(), temp);
        if (v == -1) break;
        path.push_back(v);
        ch[v] = 1;
    }
    for (int i = 0; i < n; i++) if (ch[i] == 0) clique.push_back(i);

    bool connected = false;
    if (path.size() > 0 && clique.size() > 0) connected = are_connected(path, clique);
    if (connected) {
        int target = find_connected(path[0], clique);
        if (target != -1) {
            res = path;
            reverse(res.begin(), res.end());
            int t = 0;
            for (t = 0; t < clique.size(); t++) if (clique[t] == target) break;
            swap(clique[0], clique[t]);                    
            for (int j = 0; j < clique.size(); j++) res.push_back(clique[j]);
            return res;
        }
        int s = path.size() - 1;
        target = find_connected(path[s], clique);
        if (target != -1) {
            res = path;
            int t = 0;
            for (t = 0; t < clique.size(); t++) if (clique[t] == target) break;
            swap(clique[0], clique[t]);
            for (int j = 0; j < clique.size(); j++) res.push_back(clique[j]);
            return res;
        }

        for (int i = 0; i < clique.size(); i++) {
            target = find_connected(clique[i], path);
            if (target == -1) continue;
            swap(clique[i], clique.back());
            res = clique;
            while (path[0] != target) {
                int front = path[0];
                path.erase(path.begin());
                path.push_back(front);
            }
            for (int k = 0; k < path.size(); k++) res.push_back(path[k]);
            return res;
        }
    }
    else {
        if (path.size() > clique.size()) return path;
        return clique;
    }
    return {}; // never reached
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:45:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |             for (t = 0; t < clique.size(); t++) if (clique[t] == target) break;
      |                         ~~^~~~~~~~~~~~~~~
longesttrip.cpp:47:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |             for (int j = 0; j < clique.size(); j++) res.push_back(clique[j]);
      |                             ~~^~~~~~~~~~~~~~~
longesttrip.cpp:55:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |             for (t = 0; t < clique.size(); t++) if (clique[t] == target) break;
      |                         ~~^~~~~~~~~~~~~~~
longesttrip.cpp:57:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |             for (int j = 0; j < clique.size(); j++) res.push_back(clique[j]);
      |                             ~~^~~~~~~~~~~~~~~
longesttrip.cpp:61:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |         for (int i = 0; i < clique.size(); i++) {
      |                         ~~^~~~~~~~~~~~~~~
longesttrip.cpp:71:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |             for (int k = 0; k < path.size(); k++) res.push_back(path[k]);
      |                             ~~^~~~~~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 13 ms 496 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 18 ms 344 KB Output is correct
3 Correct 25 ms 344 KB Output is correct
4 Correct 40 ms 956 KB Output is correct
5 Correct 60 ms 964 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 16 ms 344 KB Output is correct
3 Correct 28 ms 600 KB Output is correct
4 Correct 45 ms 696 KB Output is correct
5 Correct 65 ms 744 KB Output is correct
6 Correct 9 ms 596 KB Output is correct
7 Correct 16 ms 344 KB Output is correct
8 Correct 28 ms 344 KB Output is correct
9 Correct 41 ms 344 KB Output is correct
10 Correct 60 ms 748 KB Output is correct
11 Correct 63 ms 732 KB Output is correct
12 Correct 60 ms 1004 KB Output is correct
13 Correct 61 ms 724 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 15 ms 344 KB Output is correct
3 Correct 40 ms 344 KB Output is correct
4 Correct 45 ms 448 KB Output is correct
5 Correct 52 ms 992 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 17 ms 344 KB Output is correct
8 Correct 31 ms 344 KB Output is correct
9 Correct 42 ms 440 KB Output is correct
10 Correct 56 ms 1000 KB Output is correct
11 Correct 54 ms 1508 KB Output is correct
12 Correct 49 ms 1240 KB Output is correct
13 Correct 54 ms 752 KB Output is correct
14 Correct 8 ms 344 KB Output is correct
15 Correct 7 ms 344 KB Output is correct
16 Correct 25 ms 344 KB Output is correct
17 Correct 22 ms 344 KB Output is correct
18 Correct 28 ms 344 KB Output is correct
19 Correct 42 ms 604 KB Output is correct
20 Correct 37 ms 440 KB Output is correct
21 Correct 60 ms 1508 KB Output is correct
22 Correct 54 ms 740 KB Output is correct
23 Correct 54 ms 1256 KB Output is correct
24 Correct 56 ms 748 KB Output is correct
25 Correct 9 ms 344 KB Output is correct
26 Correct 7 ms 344 KB Output is correct
27 Correct 18 ms 344 KB Output is correct
28 Correct 15 ms 344 KB Output is correct
29 Correct 15 ms 344 KB Output is correct
30 Correct 33 ms 436 KB Output is correct
31 Correct 22 ms 432 KB Output is correct
32 Correct 17 ms 436 KB Output is correct
33 Correct 34 ms 440 KB Output is correct
34 Correct 39 ms 440 KB Output is correct
35 Correct 33 ms 444 KB Output is correct
36 Correct 63 ms 748 KB Output is correct
37 Correct 51 ms 972 KB Output is correct
38 Correct 52 ms 988 KB Output is correct
39 Correct 46 ms 1220 KB Output is correct
40 Correct 36 ms 992 KB Output is correct
41 Correct 33 ms 988 KB Output is correct
42 Correct 30 ms 1496 KB Output is correct
43 Correct 34 ms 752 KB Output is correct
44 Correct 30 ms 708 KB Output is correct
45 Correct 10 ms 344 KB Output is correct
46 Correct 10 ms 344 KB Output is correct
47 Correct 17 ms 344 KB Output is correct
48 Correct 14 ms 344 KB Output is correct
49 Correct 20 ms 344 KB Output is correct
50 Correct 30 ms 696 KB Output is correct
51 Correct 24 ms 440 KB Output is correct
52 Correct 28 ms 436 KB Output is correct
53 Correct 35 ms 600 KB Output is correct
54 Correct 31 ms 456 KB Output is correct
55 Correct 37 ms 592 KB Output is correct
56 Correct 55 ms 1236 KB Output is correct
57 Correct 53 ms 1768 KB Output is correct
58 Correct 39 ms 976 KB Output is correct
59 Correct 47 ms 1004 KB Output is correct
60 Correct 48 ms 1244 KB Output is correct
61 Correct 35 ms 992 KB Output is correct
62 Correct 45 ms 744 KB Output is correct
63 Correct 36 ms 992 KB Output is correct
64 Correct 51 ms 964 KB Output is correct

Subtask #4
30.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 17 ms 344 KB Output is correct
3 Correct 27 ms 344 KB Output is correct
4 Partially correct 50 ms 692 KB Output is partially correct
5 Partially correct 62 ms 1756 KB Output is partially correct
6 Correct 8 ms 552 KB Output is correct
7 Correct 15 ms 344 KB Output is correct
8 Correct 28 ms 344 KB Output is correct
9 Partially correct 37 ms 604 KB Output is partially correct
10 Partially correct 55 ms 996 KB Output is partially correct
11 Partially correct 49 ms 1256 KB Output is partially correct
12 Partially correct 64 ms 1224 KB Output is partially correct
13 Partially correct 53 ms 1000 KB Output is partially correct
14 Correct 9 ms 344 KB Output is correct
15 Correct 8 ms 344 KB Output is correct
16 Correct 21 ms 596 KB Output is correct
17 Correct 24 ms 600 KB Output is correct
18 Correct 34 ms 344 KB Output is correct
19 Partially correct 33 ms 604 KB Output is partially correct
20 Partially correct 42 ms 604 KB Output is partially correct
21 Correct 8 ms 344 KB Output is correct
22 Correct 7 ms 344 KB Output is correct
23 Correct 16 ms 344 KB Output is correct
24 Correct 17 ms 344 KB Output is correct
25 Correct 13 ms 344 KB Output is correct
26 Correct 42 ms 436 KB Output is correct
27 Correct 27 ms 600 KB Output is correct
28 Correct 20 ms 440 KB Output is correct
29 Partially correct 31 ms 596 KB Output is partially correct
30 Partially correct 34 ms 600 KB Output is partially correct
31 Partially correct 29 ms 440 KB Output is partially correct
32 Correct 9 ms 340 KB Output is correct
33 Correct 11 ms 344 KB Output is correct
34 Correct 17 ms 344 KB Output is correct
35 Correct 20 ms 344 KB Output is correct
36 Correct 15 ms 344 KB Output is correct
37 Correct 28 ms 692 KB Output is correct
38 Correct 25 ms 692 KB Output is correct
39 Correct 26 ms 440 KB Output is correct
40 Partially correct 34 ms 604 KB Output is partially correct
41 Partially correct 27 ms 444 KB Output is partially correct
42 Partially correct 36 ms 440 KB Output is partially correct
43 Partially correct 63 ms 744 KB Output is partially correct
44 Partially correct 54 ms 744 KB Output is partially correct
45 Partially correct 64 ms 1004 KB Output is partially correct
46 Partially correct 57 ms 1256 KB Output is partially correct
47 Partially correct 54 ms 760 KB Output is partially correct
48 Partially correct 50 ms 752 KB Output is partially correct
49 Partially correct 55 ms 996 KB Output is partially correct
50 Partially correct 45 ms 748 KB Output is partially correct
51 Partially correct 37 ms 1000 KB Output is partially correct
52 Partially correct 32 ms 1220 KB Output is partially correct
53 Partially correct 35 ms 968 KB Output is partially correct
54 Partially correct 35 ms 748 KB Output is partially correct
55 Partially correct 34 ms 992 KB Output is partially correct
56 Partially correct 54 ms 996 KB Output is partially correct
57 Partially correct 38 ms 496 KB Output is partially correct
58 Partially correct 30 ms 1256 KB Output is partially correct
59 Partially correct 28 ms 984 KB Output is partially correct
60 Partially correct 31 ms 1404 KB Output is partially correct
61 Partially correct 30 ms 992 KB Output is partially correct
62 Partially correct 51 ms 996 KB Output is partially correct
63 Partially correct 56 ms 988 KB Output is partially correct
64 Partially correct 43 ms 744 KB Output is partially correct
65 Partially correct 48 ms 748 KB Output is partially correct
66 Partially correct 47 ms 1000 KB Output is partially correct
67 Partially correct 45 ms 996 KB Output is partially correct
68 Partially correct 49 ms 736 KB Output is partially correct
69 Partially correct 39 ms 748 KB Output is partially correct
70 Partially correct 46 ms 1252 KB Output is partially correct
71 Partially correct 68 ms 1244 KB Output is partially correct
72 Partially correct 36 ms 1256 KB Output is partially correct
73 Partially correct 35 ms 724 KB Output is partially correct
74 Partially correct 37 ms 992 KB Output is partially correct
75 Partially correct 43 ms 984 KB Output is partially correct
76 Partially correct 37 ms 496 KB Output is partially correct
77 Partially correct 53 ms 736 KB Output is partially correct
78 Partially correct 42 ms 496 KB Output is partially correct
79 Partially correct 47 ms 744 KB Output is partially correct
80 Partially correct 53 ms 992 KB Output is partially correct
81 Partially correct 45 ms 980 KB Output is partially correct
82 Partially correct 39 ms 496 KB Output is partially correct