import java.util.*;
public class Main {
    public static void main (String [] args) {
        Scanner scn = new Scanner (System.in);
        
        int r = scn.nextInt();
        int c = scn.nextInt();
        if (r<-1 || c>10) {
            System.out.print ("Invalid input");
            return;
        }
        int arr [][] = new int [r][c];
        for (int i=0; i<r; i++) {
            for (int j=0; j<c; j++) {
                if (scn.nextInt()) {
                    System.out.print("Invalid input");
                    return;
                }
                arr[i][j] = scn.nextInt();
                if (arr[i][j]<0) {
                    System.out.print("Invalid input");
                    return;
                }
            }
        }
        
        int t = scn.nextInt() ;
        int count =0;
        for (int i=0; i<r; i++) {
            for (int j=0; j<c; j++) {
                if (arr[i][j] == t) {
                    count ++;
                }
            }
        }
        System.out.print(count);
    }
}