Submission #1172648

#	Time	Username	Problem	Language	Result	Execution time	Memory
1172648		ezzzay	Team Coding (EGOI24_teamcoding)	C++20	0 / 100	7 ms	14408 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
const int N=3e5;
vector<int>v[N];
int lvl[N];
int col[N];
int cnt[N][3];
int par[N];
vector<pair<int,int>>vc[N];
pair<int,int>ans;
void df(int a ){
    cnt[lvl[a]][col[a]]++;
    for(auto b:v[a]){
        lvl[b]=lvl[a]+1;
        df(b);
    }
}
void dfs(int a ){
    map<int,int>mp,pm;
    vc[a].pb({lvl[a],col[a]});
    for(auto b:v[a]){
        dfs(b);
        if(vc[b].size()>vc[a].size()){
            swap(vc[b],vc[a]);
        }
        for(auto p:vc[b]){
            vc[a].pb(p);
            if(p.ss==col[a])mp[p.ff]++;
            else pm[p.ff]++;
        }
    }
   
    pair<int,int>t={0,0};
    int c=col[a];
    for(auto it=pm.begin();it!=pm.end();it++){
        int i= it->ff;
        t.ff+= min(pm[i],(cnt[i][c]-mp[i]));
        t.ss -= min(pm[i],(cnt[i][c]-mp[i]));
        if(mp[i]==0)mp.erase(mp.find(i));
    }
   for(auto it=mp.begin();it!=mp.end();it++){
       t.ff+=it->ss;
   }
    ans=max(ans,t);
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n,k;
    cin>>n>>k;
    int mx=0;
    for(int i=0;i<n;i++){
        cin>>col[i];
    }
    for(int i=1;i<n;i++){
        cin>>par[i];
        v[par[i]].pb(i);
    }
    df(0);
    dfs(0);
    cout<<ans.ff<<" "<<-ans.ss<<endl;
    
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 19
• Subtask 3: 0 / 27
• Subtask 4: 0 / 23
• Subtask 5: 0 / 19