#include <fstream>
#include <bitset>
using namespace std;
#define dim 100005
int n;

struct nod
{
	int info;
	nod *next;
};

nod *lista[dim];
bitset <dim> vizitat;



void dfs(int nod)
{
	if(!v[nod])
	{
		v[nod]=1;
		for(int i=1;i<=n;++i)
			if(mat[i][nod]&&!v[i])
				dfs(i);
	}
}


int main()
{
	ifstream fin("dfs.in");
	ofstream fout("dfs.out");
	
	
	int m,i ,a ,b;
	
	fin>>n >>m;
	
	for(i=1;i<=m;++i)
	{
		fin>>a >>b;
	
	
	fout<<contor;
	
	return 0;
}