oj.uz

Submission #1052321

# Submission time Handle Problem Language Result Execution time Memory
1052321 2024-08-10T13:20:44 Z Zicrus Longest Trip (IOI23_longesttrip) C++17
15 / 100
 778 ms 1840 KB 
#include <bits/stdc++.h>
#include "longesttrip.h"
using namespace std;
 
typedef long long ll;
 
vector<vector<ll>> adj, noAdj;
vector<bool> vst;
vector<vector<ll>> k;

void dfs(ll cur, ll comp) {
    vst[cur] = true;
    k[comp].push_back(cur);
    for (auto &e : noAdj[cur]) {
        if (vst[e]) continue;
        dfs(e, !comp);
    }
}
 
vector<int> longest_trip(int n, int d) {
    adj = vector<vector<ll>>(n);
    noAdj = vector<vector<ll>>(n);
    k = vector<vector<ll>>(2);
    vector<vector<bool>> mat(n, vector<bool>(n));
    for (int i = 0; i < n; i++) {
        for (int j = i+1; j < n; j++) {
            if (are_connected({i}, {j})) {
                adj[i].push_back(j);
                adj[j].push_back(i);
                mat[i][j] = true;
                mat[j][i] = true;
            }
            else {
                noAdj[i].push_back(j);
                noAdj[j].push_back(i);
            }
        }
    }

    vst = vector<bool>(n);
    ll comp = 0;
    for (int i = 0; i < n; i++) {
        if (vst[i]) continue;
        dfs(i, comp);
        comp = !comp;
    }
    if (k[0].size() < k[1].size()) swap(k[0], k[1]);

    ll mxDeg = 0, bridge = 0;
    for (int i = 0; i < k[0].size(); i++) {
        if (adj[k[0][i]].size() > mxDeg) {
            mxDeg = adj[k[0][i]].size();
            bridge = i;
        }
    }

    vst = vector<bool>(n);
    vector<int> res;
    for (int i = bridge+1; i < k[0].size(); i++) {
        vst[k[0][i]] = true;
        res.push_back(k[0][i]);
    }
    for (int i = 0; i <= bridge; i++) {
        vst[k[0][i]] = true;
        res.push_back(k[0][i]);
    }
    ll used = -1;
    for (auto &e : adj[k[0][bridge]]) {
        if (vst[e]) continue;
        used = e;
        break;
    }
    if (used == -1) return res;
    for (int i = 0; i < k[1].size(); i++) {
        if (k[1][i] == used) {
            used = i;
            break;
        }
    }
    for (int i = used; i < k[1].size(); i++) {
        res.push_back(k[1][i]);
    }
    for (int i = 0; i < used; i++) {
        res.push_back(k[1][i]);
    }

    volatile int idk = 0;
    for (int i = 1; i < res.size(); i++) {
        while (!mat[res[i-1]][res[i]] && (res[i-1] == k[0][bridge]))
            idk++;
    }

    return res;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:50:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |     for (int i = 0; i < k[0].size(); i++) {
      |                     ~~^~~~~~~~~~~~~
longesttrip.cpp:51:33: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   51 |         if (adj[k[0][i]].size() > mxDeg) {
      |             ~~~~~~~~~~~~~~~~~~~~^~~~~~~
longesttrip.cpp:59:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |     for (int i = bridge+1; i < k[0].size(); i++) {
      |                            ~~^~~~~~~~~~~~~
longesttrip.cpp:74:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |     for (int i = 0; i < k[1].size(); i++) {
      |                     ~~^~~~~~~~~~~~~
longesttrip.cpp:80:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |     for (int i = used; i < k[1].size(); i++) {
      |                        ~~^~~~~~~~~~~~~
longesttrip.cpp:88:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |     for (int i = 1; i < res.size(); i++) {
      |                     ~~^~~~~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 169 ms 1168 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 18 ms 344 KB Output is correct
3 Correct 125 ms 456 KB Output is correct
4 Correct 322 ms 600 KB Output is correct
5 Correct 745 ms 1460 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 21 ms 344 KB Output is correct
3 Correct 112 ms 344 KB Output is correct
4 Correct 299 ms 596 KB Output is correct
5 Correct 663 ms 1352 KB Output is correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 19 ms 344 KB Output is correct
8 Correct 110 ms 476 KB Output is correct
9 Correct 217 ms 560 KB Output is correct
10 Correct 576 ms 1424 KB Output is correct
11 Correct 601 ms 1124 KB Output is correct
12 Correct 584 ms 1104 KB Output is correct
13 Correct 643 ms 1156 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 25 ms 344 KB Output is correct
3 Correct 114 ms 704 KB Output is correct
4 Correct 293 ms 792 KB Output is correct
5 Correct 659 ms 1356 KB Output is correct
6 Correct 5 ms 344 KB Output is correct
7 Correct 19 ms 344 KB Output is correct
8 Correct 131 ms 344 KB Output is correct
9 Correct 234 ms 624 KB Output is correct
10 Correct 740 ms 1404 KB Output is correct
11 Correct 708 ms 1596 KB Output is correct
12 Correct 649 ms 1840 KB Output is correct
13 Correct 677 ms 1264 KB Output is correct
14 Correct 5 ms 344 KB Output is correct
15 Incorrect 1 ms 344 KB Incorrect
16 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 25 ms 344 KB Output is correct
3 Partially correct 122 ms 600 KB Output is partially correct
4 Partially correct 367 ms 576 KB Output is partially correct
5 Partially correct 704 ms 1380 KB Output is partially correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 24 ms 344 KB Output is correct
8 Partially correct 136 ms 452 KB Output is partially correct
9 Partially correct 270 ms 592 KB Output is partially correct
10 Partially correct 670 ms 1172 KB Output is partially correct
11 Partially correct 778 ms 1168 KB Output is partially correct
12 Partially correct 684 ms 1424 KB Output is partially correct
13 Partially correct 687 ms 1376 KB Output is partially correct
14 Correct 6 ms 344 KB Output is correct
15 Incorrect 1 ms 344 KB Incorrect
16 Halted 0 ms 0 KB -