Submission #987427

#	Time	Username	Problem	Language	Result	Execution time	Memory
987427		activedeltorre	Beech Tree (IOI23_beechtree)	C++17	0 / 100	2028 ms	62304 KiB

beechtree

#include "beechtree.h"
#include <vector>
#include <queue>
#include <iostream>
#include <map>
#include <algorithm>
using namespace std;
vector<int>cop[200005];
int cul[200005];
int imp[200005];
int dist[200005];
int par[200005];

vector<int>vecus;
map<int,int>mp;
map<int,int>mp2;
map<int,int>fre;
long long mod=1e9+7;
long long has[200005];
vector<long long> vactoriceanu[510];
int nmax=500;
int calc(int curr)
{
    mp2.clear();
    fre.clear();
    int cur;
    queue<int>qu;
    dist[curr]=0;
    qu.push(curr);
    vecus.clear();
    for(int i=1;i<=nmax;i++)
    {
        vactoriceanu[i].clear();
    }
    while(qu.size())
    {
        cur=qu.front();
        vecus.push_back(cur);
        qu.pop();
        for(auto k:cop[cur])
        {
            dist[k]=dist[curr]+1;
            qu.push(k);
        }
    }
    int posible=0;
    for(auto i:vecus)
    {
        if(i!=curr)
        {
            fre[cul[i]]++;
            vactoriceanu[fre[cul[i]]].push_back(cul[i]);
        }
        mp2[has[i]]++;
        posible=max(posible,imp[i]);
    }
    for(int i=1;i<=nmax;i++)
    {
        sort(vactoriceanu[i].begin(),vactoriceanu[i].end());
        long long val=0;
        for(auto j:vactoriceanu[i])
        {
            val=(val*23+j+13)%mod;
        }
        if(val!=0)
        {
            if(mp2[val]==0)
            {
                return 0;
            }
            else
            {
                mp2[val]--;
            }
        }
        vactoriceanu[i].clear();
    }
    if(posible==1)
    {
        return 0;
    }
    return 1;
}
map<pair<int,int> ,int >frevals;
std::vector<int> beechtree(int N, int M, std::vector<int> P, std::vector<int> C)
{
    int n=N,culs=M,i;
    vector<int>ans;
    for(i=1;i<n;i++)
    {
        par[i]=P[i];
        cop[P[i]].push_back(i);
        cul[i]=C[i];
    }
    for(i=0;i<n;i++)
    {
        for(auto k:cop[i])
        {
            has[i]=(has[i]*23+cul[k]+13)%mod;
            frevals[{i,cul[k]}]++;
        }
        for(auto k:cop[i])
        {
            for(auto j:cop[k])
            {
                if(frevals[{k,cul[j]}]>frevals[{i,cul[j]}])
                {
                    imp[i]=1;
                }
            }
        }
    }
    for(i=0;i<n ;i++)
    {
        ans.push_back(calc(i));
    }
    return ans;
}

Compilation message (stderr)

beechtree.cpp: In function 'std::vector<int> beechtree(int, int, std::vector<int>, std::vector<int>)':
beechtree.cpp:87:13: warning: unused variable 'culs' [-Wunused-variable]
   87 |     int n=N,culs=M,i;
      |             ^~~~

• Subtask 0: 0 / 0
• Subtask 1: 0 / 9
• Subtask 2: 0 / 5
• Subtask 3: 0 / 9
• Subtask 4: 0 / 8
• Subtask 5: 0 / 14
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• Subtask 9: 0 / 12