oj.uz

Submission #924764

# Submission time Handle Problem Language Result Execution time Memory
924764 2024-02-09T16:04:10 Z alexander707070 Making Friends on Joitter is Fun (JOI20_joitter2) C++14
0 / 100
 5 ms 17500 KB 
#include<bits/stdc++.h>
#define MAXN 100007
using namespace std;
 
int n,m,a,b,x,y,ans;
int comp[MAXN],sz[MAXN];
vector<int> ver[MAXN];
multiset<int> v[MAXN],r[MAXN];
queue<int> q;
unordered_set<int> to[MAXN];
bool dali;
 
int main(){
 
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        comp[i]=i; sz[i]=1;
        ver[i]={i};
    }
 
    for(int i=1;i<=m;i++){
        cin>>a>>b;

        dali=false;
        if(to[a].find(comp[b])==to[a].end())dali=true;
        to[a].insert(comp[b]);

        a=comp[a]; b=comp[b];
 
        if(a==b){
            cout<<ans<<"\n";
            continue;
        }


        if(dali){
            v[a].insert(b);
            r[b].insert(a);
            ans+=sz[b];
        }

        if(v[b].find(a)==v[b].end()){
            cout<<ans<<"\n";
            continue;
        }
 
        q.push(b);
 
        while(!q.empty()){
            b=q.front();
            q.pop();
 
            if(sz[b]==0)continue;
            if(v[a].size()+r[a].size()+ver[a].size() < v[b].size() + r[b].size() + ver[b].size())swap(a,b);
 
            ans-=sz[a]*(sz[a]-1);
            ans-=sz[b]*(sz[b]-1);
 
            ans-=int(r[a].size())*sz[a];
            ans-=int(r[b].size())*sz[b];
 
            v[a].erase(b);
            r[b].erase(a);
 
            v[b].erase(a);
            r[a].erase(b);
 
            for(int i:v[b]){
                r[i].erase(b);
 
                v[a].insert(i);
                r[i].insert(a);
 
                if(r[a].find(i)!=r[a].end()){
                    q.push(i);
                }
            }
            v[b].clear();
 
            for(int i:r[b]){
                v[i].erase(b);
 
                r[a].insert(i);
                v[i].insert(a);
 
                if(v[a].find(i)!=v[a].end()){
                    q.push(i);
                }
            }
            r[b].clear();
 
            for(int i:ver[b]){
                ver[a].push_back(i);
                comp[i]=a;
            }
            ver[b].clear();
 
            sz[a]+=sz[b]; sz[b]=0;
            ans+=sz[a]*(sz[a]-1);
            ans+=int(r[a].size())*sz[a];
        }
 
        cout<<ans<<"\n";
    }
 
    return 0;
}

Subtask #1
0 / 1.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 17500 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 17500 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 83.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 17500 KB Output isn't correct
2 Halted 0 ms 0 KB -