oj.uz

Submission #1052317

# Submission time Handle Problem Language Result Execution time Memory
1052317 2024-08-10T13:19:55 Z Zicrus Longest Trip (IOI23_longesttrip) C++17
15 / 100
 720 ms 1632 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] && res[i] == k[1][used]))
            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 168 ms 1540 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 23 ms 344 KB Output is correct
3 Correct 123 ms 344 KB Output is correct
4 Correct 398 ms 648 KB Output is correct
5 Correct 720 ms 1340 KB Output is correct

Subtask #2
10.0 / 10.0

# 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 109 ms 344 KB Output is correct
4 Correct 347 ms 796 KB Output is correct
5 Correct 695 ms 1340 KB Output is correct
6 Correct 5 ms 344 KB Output is correct
7 Correct 17 ms 344 KB Output is correct
8 Correct 124 ms 344 KB Output is correct
9 Correct 287 ms 556 KB Output is correct
10 Correct 566 ms 1272 KB Output is correct
11 Correct 598 ms 1120 KB Output is correct
12 Correct 670 ms 1468 KB Output is correct
13 Correct 607 ms 1116 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 23 ms 344 KB Output is correct
3 Correct 119 ms 484 KB Output is correct
4 Correct 297 ms 804 KB Output is correct
5 Correct 568 ms 1160 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 19 ms 344 KB Output is correct
8 Correct 121 ms 696 KB Output is correct
9 Correct 225 ms 556 KB Output is correct
10 Correct 644 ms 1228 KB Output is correct
11 Correct 649 ms 1172 KB Output is correct
12 Correct 709 ms 1464 KB Output is correct
13 Correct 720 ms 1412 KB Output is correct
14 Correct 6 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 18 ms 344 KB Output is correct
3 Partially correct 126 ms 344 KB Output is partially correct
4 Partially correct 322 ms 580 KB Output is partially correct
5 Partially correct 682 ms 1632 KB Output is partially correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 15 ms 344 KB Output is correct
8 Partially correct 127 ms 456 KB Output is partially correct
9 Partially correct 267 ms 592 KB Output is partially correct
10 Partially correct 696 ms 1176 KB Output is partially correct
11 Partially correct 674 ms 1172 KB Output is partially correct
12 Partially correct 704 ms 1208 KB Output is partially correct
13 Partially correct 589 ms 1568 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 -