#include <fstream>
using namespace std;
ifstream fin("dfs.in");
ofstream fout("dfs.out");

int a[101][101], n, m, x, v[101]
void citire()
{
    int i,j;
    fin>>n>>m>>x;
    for(int k=1; k<=n; k++)
    {
        fin>>i>>j;
        a[i][j]=a[j][i]=1

    }

}
void dfs(int i)
{

}
int main()
{
    citire();
    dfs(x);
    fin.close();
    fout.close();
}