oj.uz

Submission #948769

# Submission time Handle Problem Language Result Execution time Memory
948769 2024-03-18T13:36:58 Z Aiperiii Pipes (CEOI15_pipes) C++14
0 / 100
 2609 ms 62240 KB 
#include <bits/stdc++.h>
//#define int long long
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
const int N=1e5+5;
int p[2][N],vis[N],tin[N],low[N];
vector <int> g[N];
int find_set(int i,int v){
    if(p[i][v]==v)return v;
    return p[i][v]=find_set(i,p[i][v]);
}
bool union_set(int i,int u,int v){
    if(find_set(i,u)==find_set(i,v))return false;
    p[i][u]=v;
    return true;
}
int t=0;
void dfs(int v,int p){
    vis[v]=1;
    t++;
    tin[v]=t;
    low[v]=t;
    for(auto to : g[v]){
        if(to!=p){
            if(vis[to])low[v]=min(low[v],tin[to]);
            else{
                dfs(to,v);
                low[v]=min(low[v],low[to]);
                if(low[to]>tin[v]){
                    cout<<v<<" "<<to<<"\n";
                }
            }
        }
    }
    
}
signed main(){
    ios_base::sync_with_stdio();
    cin.tie(0);cout.tie(0);
    int n,m;
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        p[0][i]=i;
        p[1][i]=i;
    }
    
    for(int i=0;i<m;i++){
        int u,v;
        cin>>u>>v;
        if(union_set(0,u,v)){
            g[u].pb(v);
            g[v].pb(u);
        }
        else if(union_set(1,u,v)){
            g[u].pb(v);
            g[v].pb(u);
        }
    }
    for(int i=1;i<=n;i++){
        sort(all(g[i]));
        for(int j=1;j<g[i].size();j++){
            if(g[i][j]==g[i][j-1]){
                g[i][j]=0;
                g[i][j-1]=0;
            }
        }
    }
    for(int i=1;i<=n;i++){
        if(!vis[i])dfs(i,0);
    }
}

Compilation message

pipes.cpp: In function 'int main()':
pipes.cpp:64:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |         for(int j=1;j<g[i].size();j++){
      |                     ~^~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4696 KB Wrong number of edges
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 4956 KB Wrong number of edges
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 191 ms 5456 KB Wrong number of edges
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 347 ms 6784 KB Wrong number of edges
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 576 ms 10080 KB Wrong number of edges
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 892 ms 24788 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1357 ms 25256 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1820 ms 38184 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 2146 ms 49932 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 2609 ms 62240 KB Memory limit exceeded
2 Halted 0 ms 0 KB -