Cod sursa(job #3213677)
Utilizator | Vlad Ionescu vlad414141414141 | Data | 13 martie 2024 12:45:19 |
---|---|---|---|
Problema | Parcurgere DFS - componente conexe | Scor | 15 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.69 kb |
#include <bits/stdc++.h>
using namespace std;
ifstream fin ("dfs.in");
ofstream fout ("dfs.out");
bool viz[100041];
int n, m;
vector <int> g[100041];
void read()
{
fin >> n >> m;
for (int i=0;i<m;++i)
{
int x, y;
fin >> x >> y;
g[x].push_back(y);
}
}
void dfs(int st)
{
viz[st]=true;
for (int i=0;i<g[st].size();++i)
{
if (!viz[g[st][i]])
{
dfs(g[st][i]);
}
}
return;
}
int main()
{
read();
int c=0;
for (int i=1;i<=n;++i)
{
if (!viz[i])
{
dfs(i);
c++;
}
}
fout << c;
return 0;
}