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Submission #861625

# Submission time Handle Problem Language Result Execution time Memory
861625 2023-10-16T15:12:52 Z faustaadp Longest Trip (IOI23_longesttrip) C++17
0 / 100
 1000 ms 4708 KB 
#include "longesttrip.h"
#include<bits/stdc++.h>
typedef long long ll;
using namespace std;
#define pb push_back
const ll NN = 1e5 + 5;
vector<int> ret, ret2;
ll b[NN], n, ada = 0, mxx, now;
vector<ll> v[NN];
void dfs(ll pos)
{
    if(ada)return ;
    b[pos] = 1;
    ret.pb(pos);
    // cout << pos << " mas " << ret.size() << "_\n";
    // cout << ret.size() << " dan " << mxx << "\n";
    if(ret.size() * 2 >= mxx)ada = 1;
    if(ada)return;
    // random_shuffle(v[pos].begin(), v[pos].end());
    for(ll i = 0; i < v[pos].size(); i++)
    {
        if(b[v[pos][i]] == 0)dfs(v[pos][i]);
        if(ada)return ;
    }
    b[pos] = 0;
    // cout << pos << " kel\n";
    ret.pop_back();
}
void dfs2(ll pos)
{
    now++;
    mxx = max(mxx, now);
    b[pos] = 1;
    for(ll i = 0; i < v[pos].size(); i++)
        if(b[v[pos][i]] == 0)
            dfs2(v[pos][i]);
}
std::vector<int> longest_trip(int N, int D)
{
    mxx = 0;
    ada = 0;
    n = N;
    ret.clear();
    for(ll i = 0; i < N; i++)
    {
        v[i].clear();
        b[i] = 0;
    }
    for(ll i = 0; i < N; i++)
        for(ll j = i + 1; j < N; j++)
        {
            vector<int> A;A.pb(i);
            vector<int> B;B.pb(j);
            bool isi = are_connected(A, B);
            if(isi)
            {
                // cout << i << "--" << j << "\n";
                v[i].pb(j);
                v[j].pb(i);
            }
        }
    for(ll i = 0; i < N; i++)
        if(!b[i])
        {
            now = 0;
            dfs2(i);
        }
    for(ll i = 0; i < N; i++)
    {
        b[i] = 0;
    }
    for(ll i = 0; i < N; i++)
        if(!b[i])
        {
            now = 0;
            dfs2(i);
            if(now == mxx)
            {
                 for(ll j = 0; j < N; j++)
                    {
                        b[j] = 0;
                    }
                dfs(i);
                return ret;
            }
        }
    // return ret;
    // ll mul = 1;
    // if(N % 2 == 0)
    // {
    //     vector<int> A;A.pb(0);
    //     vector<int> B;B.pb(1);
    //     bool isi = are_connected(A, B);
    //     if(!isi)
    //         swap(cal[1], cal[2]);
    //     ret.pb(cal[0]);
    //     ret.pb(cal[1]);
    // }
    // else
    //     ret.pb(cal[0]);
    // for(ll i = mul; i + 1 < N; i += 2)
    // {
    //     ll now = ret.back();
    //     vector<int> A;A.pb(now);
    //     vector<int> B;A.pb(cal[i]);
    //     bool isi = are_connected(A, B);
    //     if()
    // }
    // return ret;
}

Compilation message

longesttrip.cpp: In function 'void dfs(ll)':
longesttrip.cpp:17:23: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   17 |     if(ret.size() * 2 >= mxx)ada = 1;
      |        ~~~~~~~~~~~~~~~^~~~~~
longesttrip.cpp:20:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for(ll i = 0; i < v[pos].size(); i++)
      |                   ~~^~~~~~~~~~~~~~~
longesttrip.cpp: In function 'void dfs2(ll)':
longesttrip.cpp:34:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     for(ll i = 0; i < v[pos].size(); i++)
      |                   ~~^~~~~~~~~~~~~~~
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:110:1: warning: control reaches end of non-void function [-Wreturn-type]
  110 | }
      | ^

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2648 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #1
0.0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2648 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #2
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2648 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 2648 KB Output is correct
2 Correct 25 ms 2648 KB Output is correct
3 Correct 130 ms 3160 KB Output is correct
4 Correct 360 ms 3860 KB Output is correct
5 Correct 794 ms 3932 KB Output is correct
6 Correct 6 ms 2648 KB Output is correct
7 Correct 22 ms 2648 KB Output is correct
8 Correct 122 ms 3160 KB Output is correct
9 Correct 271 ms 3408 KB Output is correct
10 Correct 733 ms 4416 KB Output is correct
11 Correct 745 ms 4176 KB Output is correct
12 Correct 722 ms 4456 KB Output is correct
13 Correct 695 ms 3740 KB Output is correct
14 Correct 6 ms 2648 KB Output is correct
15 Correct 13 ms 2648 KB Output is correct
16 Correct 38 ms 2648 KB Output is correct
17 Correct 80 ms 3416 KB Output is correct
18 Correct 127 ms 3160 KB Output is correct
19 Correct 265 ms 3160 KB Output is correct
20 Correct 271 ms 3676 KB Output is correct
21 Correct 761 ms 4324 KB Output is correct
22 Correct 752 ms 4192 KB Output is correct
23 Correct 730 ms 4472 KB Output is correct
24 Correct 724 ms 4708 KB Output is correct
25 Correct 8 ms 2648 KB Output is correct
26 Correct 10 ms 2648 KB Output is correct
27 Correct 20 ms 2648 KB Output is correct
28 Correct 22 ms 2648 KB Output is correct
29 Correct 20 ms 2644 KB Output is correct
30 Correct 164 ms 3052 KB Output is correct
31 Correct 160 ms 3292 KB Output is correct
32 Correct 175 ms 3304 KB Output is correct
33 Correct 247 ms 3372 KB Output is correct
34 Correct 250 ms 3580 KB Output is correct
35 Correct 289 ms 3416 KB Output is correct
36 Correct 706 ms 4524 KB Output is correct
37 Correct 721 ms 4596 KB Output is correct
38 Correct 705 ms 4540 KB Output is correct
39 Correct 697 ms 4168 KB Output is correct
40 Correct 724 ms 4640 KB Output is correct
41 Correct 653 ms 3556 KB Output is correct
42 Correct 759 ms 4108 KB Output is correct
43 Correct 726 ms 4552 KB Output is correct
44 Correct 796 ms 4416 KB Output is correct
45 Correct 12 ms 2648 KB Output is correct
46 Correct 8 ms 2648 KB Output is correct
47 Correct 22 ms 2648 KB Output is correct
48 Correct 23 ms 2904 KB Output is correct
49 Correct 20 ms 2904 KB Output is correct
50 Correct 166 ms 3328 KB Output is correct
51 Execution timed out 3071 ms 3308 KB Time limit exceeded
52 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2648 KB Incorrect
2 Halted 0 ms 0 KB -