제출 #1080384

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1080384		oscar1f	9월 (APIO24_september)	C++17	0 / 100	2 ms	5468 KiB

september

#include<bits/stdc++.h>
#include "september.h"
using namespace std;

const int MAX_SOM=100*1000+5;
vector<int> adja[MAX_SOM],adjaTrans[MAX_SOM];
vector<int> ordre;
int nbCompo;
bool dv[MAX_SOM];
int numCompo[MAX_SOM];

void addAre(int deb,int fin) {
	adja[deb].push_back(fin);
	adjaTrans[fin].push_back(deb);
}

void DFS(int pos) {
	if (!dv[pos]) {
		dv[pos]=true;
		for (int i:adja[pos]) {
			DFS(i);
		}
		ordre.push_back(pos);
	}
}

void DFS_trans(int pos) {
	if (numCompo[pos]==0) {
		numCompo[pos]=nbCompo;
		for (int i:adjaTrans[pos]) {
			DFS_trans(i);
		}
	}
}

int solve(int nbSom,int nbPers,vector<int> pere,vector<vector<int>> S) {
	for (int i=0;i<nbSom;i++) {
		adja[i].clear();
		adjaTrans[i].clear();
	}
	for (int i=0;i<nbSom;i++) {
		addAre(pere[i],i);
	}
	for (int i=0;i<nbPers;i++) {
		for (int j=0;j<nbSom-2;j++) {
			addAre(S[i][j],S[i][j+1]);
		}
	}
	nbCompo=0;
	ordre.clear();
	for (int i=0;i<nbSom;i++) {
		dv[i]=false;
		numCompo[i]=0;
	}
	for (int i=0;i<nbSom;i++) {
		DFS(i);
	}
	reverse(ordre.begin(),ordre.end());
	for (int i:ordre) {
		if (numCompo[i]==0) {
			nbCompo++;
			DFS_trans(i);
		}
	}
	/*for (int i=0;i<nbSom;i++) {
		cout<<numCompo[i]<<" ";
	}
	cout<<endl;*/
	return nbCompo-1; 
}
 

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