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Submission #961064

# Submission time Handle Problem Language Result Execution time Memory
961064 2024-04-11T13:12:51 Z 12345678 Longest Trip (IOI23_longesttrip) C++17
15 / 100
 786 ms 2132 KB 
#include "longesttrip.h"
#include <bits/stdc++.h>

using namespace std;

const int nx=305;

int qrs[nx][nx], vs[nx], m, cnt, u, v, r[nx], st, ed, p;
vector<int> d[nx];

int query(int i, int j)
{
    if (i>j) swap(i, j);
    return qrs[i][j];
}

void dfs(int u)
{
    vs[u]=1;
    cnt++;
    for (auto v:d[u]) if (!vs[v]) dfs(v);
}

std::vector<int> longest_trip(int N, int D)
{
    for (int i=0; i<N; i++) d[i].clear(), vs[i]=0;
    for (int i=0; i<N; i++) for (int j=i+1; j<N; j++) qrs[i][j]=are_connected(vector<int> {i}, vector<int> {j});
    for (int i=0; i<N; i++) for (int j=0; j<N; j++) if (query(i, j)) d[i].push_back(j);
    cnt=0;
    dfs(0);
    vector<int> res;
    if (cnt!=N)
    {
        if (cnt>=N-cnt) m=1;
        for (int i=0; i<N; i++)
        {
            if (vs[i]&&m) res.push_back(i);
            if (!vs[i]&&!m) res.push_back(i);
        }
        return res;
    }
    st=ed=0;
    queue<pair<int, int>> q;
    q.push({0, 0});
    for (int i=0; i<N;i ++) vs[i]=0;
    vs[0]=1;
    while (!q.empty())
    {
        auto [u, p]=q.front();
        if (u!=0)
        {
            if (query(u, st)) r[u]=st, st=u;
            else if (query(u, ed)) r[ed]=u, ed=u;
            else
            {
                r[ed]=st;
                r[u]=p;
                st=u;
            }
        }
        q.pop();
        for (auto v:d[u]) 
        {
            if (!vs[v]) vs[v]=1, q.push({v, u});
        }
    }
    while (st!=ed) res.push_back(st), st=r[st];
    res.push_back(ed);
    return res;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Incorrect 183 ms 2132 KB Incorrect
3 Halted 0 ms 0 KB -

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 600 KB Output is correct
2 Correct 23 ms 600 KB Output is correct
3 Correct 142 ms 1216 KB Output is correct
4 Correct 342 ms 1260 KB Output is correct
5 Correct 712 ms 1700 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 29 ms 596 KB Output is correct
3 Correct 120 ms 1368 KB Output is correct
4 Correct 360 ms 1368 KB Output is correct
5 Correct 761 ms 2124 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 24 ms 344 KB Output is correct
8 Correct 135 ms 1112 KB Output is correct
9 Correct 290 ms 856 KB Output is correct
10 Correct 720 ms 1896 KB Output is correct
11 Correct 696 ms 2104 KB Output is correct
12 Correct 732 ms 2080 KB Output is correct
13 Correct 742 ms 1652 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 344 KB Output is correct
2 Correct 22 ms 344 KB Output is correct
3 Correct 149 ms 1152 KB Output is correct
4 Correct 346 ms 1492 KB Output is correct
5 Correct 733 ms 1408 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 30 ms 600 KB Output is correct
8 Correct 133 ms 1368 KB Output is correct
9 Correct 279 ms 1028 KB Output is correct
10 Correct 724 ms 2056 KB Output is correct
11 Correct 772 ms 1664 KB Output is correct
12 Correct 741 ms 1920 KB Output is correct
13 Correct 786 ms 1404 KB Output is correct
14 Correct 7 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 9 ms 596 KB Output is correct
2 Correct 26 ms 600 KB Output is correct
3 Partially correct 133 ms 1112 KB Output is partially correct
4 Partially correct 371 ms 1260 KB Output is partially correct
5 Partially correct 731 ms 1440 KB Output is partially correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 25 ms 600 KB Output is correct
8 Partially correct 128 ms 1104 KB Output is partially correct
9 Partially correct 299 ms 720 KB Output is partially correct
10 Partially correct 739 ms 1684 KB Output is partially correct
11 Partially correct 734 ms 1844 KB Output is partially correct
12 Partially correct 744 ms 1456 KB Output is partially correct
13 Partially correct 747 ms 1720 KB Output is partially correct
14 Incorrect 0 ms 344 KB Incorrect
15 Halted 0 ms 0 KB -