oj.uz

Submission #1052314

# Submission time Handle Problem Language Result Execution time Memory
1052314 2024-08-10T13:18:50 Z Zicrus Longest Trip (IOI23_longesttrip) C++17
15 / 100
 1000 ms 1628 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[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 171 ms 956 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 23 ms 344 KB Output is correct
3 Correct 98 ms 476 KB Output is correct
4 Correct 325 ms 764 KB Output is correct
5 Correct 633 ms 1356 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 17 ms 596 KB Output is correct
3 Correct 112 ms 468 KB Output is correct
4 Correct 328 ms 648 KB Output is correct
5 Correct 651 ms 1352 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 18 ms 344 KB Output is correct
8 Correct 126 ms 592 KB Output is correct
9 Correct 292 ms 812 KB Output is correct
10 Correct 725 ms 1168 KB Output is correct
11 Correct 661 ms 1112 KB Output is correct
12 Correct 702 ms 1516 KB Output is correct
13 Correct 684 ms 1452 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 18 ms 344 KB Output is correct
3 Correct 103 ms 344 KB Output is correct
4 Correct 313 ms 592 KB Output is correct
5 Correct 676 ms 1628 KB Output is correct
6 Correct 10 ms 344 KB Output is correct
7 Correct 19 ms 344 KB Output is correct
8 Correct 121 ms 344 KB Output is correct
9 Correct 248 ms 996 KB Output is correct
10 Correct 654 ms 1128 KB Output is correct
11 Correct 742 ms 1160 KB Output is correct
12 Correct 667 ms 1168 KB Output is correct
13 Correct 732 ms 1352 KB Output is correct
14 Correct 6 ms 340 KB Output is correct
15 Execution timed out 3066 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 4 ms 344 KB Output is correct
2 Correct 18 ms 436 KB Output is correct
3 Partially correct 111 ms 344 KB Output is partially correct
4 Partially correct 318 ms 592 KB Output is partially correct
5 Partially correct 717 ms 1420 KB Output is partially correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 19 ms 344 KB Output is correct
8 Partially correct 112 ms 460 KB Output is partially correct
9 Partially correct 261 ms 556 KB Output is partially correct
10 Partially correct 685 ms 1168 KB Output is partially correct
11 Partially correct 672 ms 1076 KB Output is partially correct
12 Partially correct 718 ms 1132 KB Output is partially correct
13 Partially correct 654 ms 1456 KB Output is partially correct
14 Correct 9 ms 344 KB Output is correct
15 Execution timed out 3073 ms 344 KB Time limit exceeded
16 Halted 0 ms 0 KB -