#include <fstream>
#include <iostream>
#define NMAX 2000
#define MMAX 20000
using namespace std;
ifstream fin ("tunel.in");
ofstream fout ("tunel.out");


int cautbin (int v[], int k, int y){
  int st = 1;
  int dr = k;
  int ans = MMAX;
  while (st <= dr){
    int mid = (st + dr) / 2;

    if (v[mid] <= y)
    {
      st = mid + 1;
    }
    else {
      ans = v[mid];
      dr = mid - 1;
    }
  }
  return ans;
}

int mat[NMAX][MMAX];
int v[NMAX];
int main(){
  int n, m, cer, k, x;
  fin >> cer;
  fin >> n >> m >> x;
  for (int i = 1; i <= n - 1; i++){
    fin >> k;
    v[i] = k;
    for (int j = 1; j <= k; j++)
      fin >> mat[i][j];
  }
  if (cer == 1){
    int linc ,colc, t;
    int jos, sus;

    linc = x;
    colc = 0;
    while (colc < m){
      if (linc < n)
       jos = cautbin(mat[linc], v[linc], colc);
      else
        jos = MMAX;
      if (linc > 1)
        sus = cautbin(mat[linc - 1], v[linc - 1], colc);
      else
        sus = MMAX;
      if(jos == MMAX && sus == MMAX)
        break;
      if (jos < sus)
        linc ++;
      else
        linc --;
      colc = min (jos, sus);
    }
    fout << linc;
  }
  return 0;
}