Pagini recente » Borderou de evaluare (job #1054939) | Cod sursa (job #907243)
Cod sursa(job #907243)
#include<fstream>
#include<vector>
#define maxn 100002
using namespace std;
int n,m,c;
int nrv[maxn], v[maxn];
vector <int> a[maxn];
void citire()
{
ifstream fin("dfs.in");
fin>>n>>m;
int x,y;
for(int i=1;i<=m;i++)
{
fin>>x>>y;
a[x].push_back(y);
}
for(int i=1;i<=n;i++)
{
nrv[i]=a[i].size();
}
}
void dfs(int nod)
{
v[nod]=1;
for(int i=0;i<nrv[nod];i++)
dfs(a[nod][i]);
}
void afisare()
{
ofstream fout("dfs.out");
fout<<c;
}
int main()
{
citire();
for(int i=1;i<=n;i++)
if(!v[i])
{
dfs(i);
c++;
}
afisare();
return 0;
}