oj.uz

Submission #978473

# Submission time Handle Problem Language Result Execution time Memory
978473 2024-05-09T08:51:01 Z happy_node Meetings (JOI19_meetings) C++17
0 / 100
 13 ms 596 KB 
#include "meetings.h"
#include <bits/stdc++.h>
using namespace std;

const int MX=2005;

vector<pair<int,int>> edges;
bool vis[MX];

void dfs(int root, vector<int> v) {
        if(v.size()==1) {
                return;
        }

        vector<int> curRoot;
        vector<vector<int>> items;

        for(auto u:v) {
                if(u==root) continue;

                int pt=0;
                for(auto r:curRoot) {
                        // at this subtree
                        int q=Query(root,r,u);

                        if(q==root) {
                                // not at this subtree
                                pt++;
                                continue;
                        }

                        // at this subtree
                        curRoot[pt]=q;
                        if(!vis[q]) items[pt].push_back(q);
                        vis[q]=true;
                        if(!vis[u]) items[pt].push_back(u);
                        vis[u]=true;
                        break;
                }

                if(!vis[u]) {
                        vis[u]=true;
                        curRoot.push_back(u);
                        items.push_back({u});
                }
        }

        for(auto u:v) {
                vis[u]=false;
        }

        int pt=0, sum=1;
        for(auto r:curRoot) {
                edges.push_back({root,r});
                sum+=items[pt].size();
                dfs(r,items[pt]);
                pt++;
        }
        assert(sum==v.size());
}

void Solve(int N) {
        vector<int> v;
        for(int i=0;i<N;i++) v.push_back(i);
        dfs(0,v);
        
        for(auto [u,v]:edges) {
                Bridge(u,v);
        }
}

Compilation message

In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from meetings.cpp:2:
meetings.cpp: In function 'void dfs(int, std::vector<int>)':
meetings.cpp:59:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |         assert(sum==v.size());
      |                ~~~^~~~~~~~~~

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Incorrect 0 ms 344 KB Wrong Answer [3]
3 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Incorrect 0 ms 344 KB Wrong Answer [3]
3 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Incorrect 0 ms 344 KB Wrong Answer [3]
3 Halted 0 ms 0 KB -

Subtask #4
0 / 71.0

# Verdict Execution time Memory Grader output
1 Incorrect 13 ms 596 KB Wrong Answer [1]
2 Halted 0 ms 0 KB -