제출 #1087499

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1087499		KALARRY	9월 (APIO24_september)	C++17	0 / 100	2 ms	2904 KiB

september

//chockolateman

#include<bits/stdc++.h>

using namespace std;

int in_deegree[100005][10],positions[10];
vector<int> children[100005];
bool removed[100005][10];
bool set_to_remove[100005][10];

void init(int N,int M)
{
    for(int i = 0 ; i < M ; i++)
    {
        positions[i] = 0;
        for(int j = 0 ; j < N ; j++)
        {
            in_deegree[j][i] = 0;
            children[j].clear();
            removed[j][i] = false;
            set_to_remove[j][i] = false;
        }
    }
}

int solve(int N, int M, std::vector<int> F,std::vector<std::vector<int>> S)
{
    for(int i = 1 ; i < N ; i++)
    {
        children[F[i]].push_back(i);
        for(int j = 0 ; j < M ; j++)
        {
            in_deegree[F[i]][j]++;
        }
    }
    int counter = 0;
    stack<int> removal_list;
    while(positions[0] != N-1)
    {
        counter++;
        for(int i = 0 ; i < M ; i++)
        {
            removal_list.push(S[i][positions[i]]);
            set_to_remove[S[i][positions[i]]][i] = true;
            positions[i]++;
        }
        while(!removal_list.empty())
        {
            int v = removal_list.top();
            removal_list.pop();
            for(int i = 0 ; i < M ; i++)
                if(!removed[v][i])
                {
                    if(!set_to_remove[v][i])
                    {
                        while(S[i][positions[i]] != v)
                        {
                            set_to_remove[S[i][positions[i]]][i] = true;
                            removal_list.push(S[i][positions[i]]);
                            in_deegree[S[i][positions[i]]][i]--;
                            positions[i]++;
                        }
                        set_to_remove[S[i][positions[i]]][i] = true;
                        removal_list.push(S[i][positions[i]]);
                        in_deegree[F[S[i][positions[i]]]][i]--;
                        positions[i]++;
                    }
                    removed[v][i] = true;
                    if(in_deegree[v][i]==0)
                        continue;
                    for(auto u : children[v])
                    {
                        if(!set_to_remove[u][i])
                            continue;
                        in_deegree[v][i]--;
                        removal_list.push(u);
                    }
                }
        }
    }
    init(N,M);
    return counter;
}

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