oj.uz

Submission #1052294

# Submission time Handle Problem Language Result Execution time Memory
1052294 2024-08-10T13:07:21 Z Zicrus Longest Trip (IOI23_longesttrip) C++17
15 / 100
 1000 ms 1876 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;
        res.push_back(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+1; 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]])
            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:80:28: 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+1; 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 177 ms 1104 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 24 ms 344 KB Output is correct
3 Correct 126 ms 600 KB Output is correct
4 Correct 301 ms 600 KB Output is correct
5 Correct 751 ms 1360 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 27 ms 344 KB Output is correct
3 Correct 113 ms 344 KB Output is correct
4 Correct 360 ms 592 KB Output is correct
5 Correct 726 ms 1104 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 18 ms 344 KB Output is correct
8 Correct 113 ms 488 KB Output is correct
9 Correct 241 ms 808 KB Output is correct
10 Correct 734 ms 1168 KB Output is correct
11 Correct 675 ms 1592 KB Output is correct
12 Correct 699 ms 1628 KB Output is correct
13 Correct 704 ms 1440 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 340 KB Output is correct
2 Correct 19 ms 344 KB Output is correct
3 Correct 141 ms 344 KB Output is correct
4 Correct 348 ms 600 KB Output is correct
5 Correct 719 ms 1564 KB Output is correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 19 ms 344 KB Output is correct
8 Correct 140 ms 344 KB Output is correct
9 Correct 264 ms 564 KB Output is correct
10 Correct 641 ms 1572 KB Output is correct
11 Correct 667 ms 1208 KB Output is correct
12 Correct 717 ms 1240 KB Output is correct
13 Correct 674 ms 1336 KB Output is correct
14 Correct 7 ms 344 KB Output is correct
15 Execution timed out 3093 ms 344 KB Time limit exceeded
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 21 ms 344 KB Output is correct
3 Partially correct 116 ms 344 KB Output is partially correct
4 Partially correct 338 ms 796 KB Output is partially correct
5 Partially correct 691 ms 1876 KB Output is partially correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 19 ms 344 KB Output is correct
8 Partially correct 122 ms 344 KB Output is partially correct
9 Partially correct 234 ms 556 KB Output is partially correct
10 Partially correct 640 ms 1356 KB Output is partially correct
11 Partially correct 731 ms 1188 KB Output is partially correct
12 Partially correct 716 ms 1224 KB Output is partially correct
13 Partially correct 724 ms 1360 KB Output is partially correct
14 Correct 5 ms 344 KB Output is correct
15 Execution timed out 3096 ms 344 KB Time limit exceeded
16 Halted 0 ms 0 KB -