#include <bits/stdc++.h>
#include <stdio.h>
using namespace std;
vector<int> used;
vector<int> v[107];
int ans=0;
void dfs(int k)
{
    cout<<"start\n";
    used[k]=1;
    ans++;
    for (auto i : v[k]) {if (used[i]==0) dfs(i);
        cout<<"1 ";
}
int main ()
{
int n,k,f;
scanf("%d %d",&n, &k);
for(int i = 1; i <= n; i++) for (int j=1; j<=n; j++) {scanf("%d",&f);
v[i].push_back(f);}
dfs(k);
cout<<ans<<endl;
return 0;
}