Cod sursa(job #2418156)
Utilizator | Zaharia Stefan Tudor stefzah | Data | 3 mai 2019 20:59:38 |
---|---|---|---|
Problema | Parcurgere DFS - componente conexe | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.49 kb |
#include <fstream>
#include <vector>
using namespace std;
ifstream fin("dfs.in");
ofstream fout("dfs.out");
int N,M,x,y,ct;
vector <int> v[100005];
bool f[100005];
void DFS(int nod)
{int i;
f[nod]=1;
for(i=0;i<v[nod].size();i++)
{if(f[v[nod][i]]==0)DFS(v[nod][i]);
}
}
int main()
{int i;
fin>>N>>M;
for(i=1;i<=M;i++)
{fin>>x>>y;
v[x].push_back(y);
v[y].push_back(x);
}
ct=0;
for(i=1;i<=N;i++)
if(f[i]==0){DFS(i);ct++;}
fout<<ct;
}