oj.uz

Submission #948746

# Submission time Handle Problem Language Result Execution time Memory
948746 2024-03-18T12:58:08 Z thinknoexit Longest Trip (IOI23_longesttrip) C++17
5 / 100
 800 ms 676 KB 
#include <bits/stdc++.h>
#include "longesttrip.h"
using namespace std;
using ll = long long;
int n, d;
vector<int> longest_trip(int N, int D) {
    n = N;
    d = D;
    vector<vector<int>> adj(n, vector<int>(n, 1));
    vector<int> deg(n, 0), p(n, 0);
    for (int i = 0;i < n;i++) {
        for (int j = i + 1;j < n;j++) {
            adj[i][j] = adj[j][i] = are_connected({ i }, { j });
            if (adj[i][j]) deg[i]++, deg[j]++;
        }
    }
    set<int> rem;
    for (int i = 0;i < n;i++) if (deg[i] != n - 1) rem.insert(i);
    queue<int> q;
    for (int i = 0;i < n;i++) {
        if (deg[i] == n - 1) continue;
        q.push(i);
        p[i] = 1;
        break;
    }
    while (!q.empty()) {
        int v = q.front();
        q.pop();
        vector<int> del;
        for (auto& i : rem) {
            if (!p[i] && !adj[v][i]) {
                p[i] = 3 - p[v];
                del.push_back(i);
                q.push(i);
            }
        }
        for (auto& x : del) rem.erase(x);
    }
    assert(rem.empty());
    vector<int> r1, r2;
    for (int i = 0;i < n;i++) {
        if (!p[i]) p[i] = 1;
        if (p[i] == 1) r1.push_back(i);
        else r2.push_back(i);
    }
    if ((int)r1.size() == n) return r1; // Complete Graph
    int s1 = r1.size(), s2 = r2.size();
    for (int i = 0;i < s1;i++) {
        for (int j = 0;j < s2;j++) {
            if (adj[r1[i]][r2[j]]) {
                swap(r1[s1 - 1], r1[i]);
                swap(r2[0], r2[j]);
                vector<int> ans;
                for (auto& x : r1) ans.push_back(x);
                for (auto& x : r2) ans.push_back(x);
                return ans;
            }
        }
    }
    if ((int)r1.size() > (int)r2.size()) return r1;
    return r2;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 344 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 24 ms 344 KB Output is correct
3 Correct 115 ms 340 KB Output is correct
4 Correct 384 ms 344 KB Output is correct
5 Correct 772 ms 676 KB Output is correct

Subtask #2
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 344 KB Output is correct
2 Correct 25 ms 344 KB Output is correct
3 Correct 115 ms 344 KB Output is correct
4 Correct 369 ms 344 KB Output is correct
5 Correct 724 ms 676 KB Output is correct
6 Runtime error 1 ms 344 KB Execution killed with signal 6
7 Halted 0 ms 0 KB -

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 28 ms 344 KB Output is correct
3 Correct 130 ms 344 KB Output is correct
4 Correct 331 ms 344 KB Output is correct
5 Correct 800 ms 676 KB Output is correct
6 Runtime error 1 ms 344 KB Execution killed with signal 6
7 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 26 ms 344 KB Output is correct
3 Partially correct 123 ms 340 KB Output is partially correct
4 Partially correct 369 ms 344 KB Output is partially correct
5 Partially correct 727 ms 676 KB Output is partially correct
6 Runtime error 1 ms 600 KB Execution killed with signal 6
7 Halted 0 ms 0 KB -