import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);       
		int n = sc.nextInt();
        int m = sc.nextInt(); 
        int c = sc.nextInt();
		int [] in = new int [m];
        int ans = 0;
        for(int i=0;i<m;i++){
                             in[i] = sc.nextInt();
                            }	
        for(int i=0;i<n;i++){int count = 0;
          for(int j=0;j<m;j++){int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}}
                            }
	System.out.println(ans);
  }
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);       
		int n = sc.nextInt();
        int m = sc.nextInt(); 
        int c = sc.nextInt();
		int [] in = new int [m];
        int ans = 0;
        for(int i=0;i<m;i++){
                             in[i] = sc.nextInt();
                            }	
        for(int i=0;i<n;i++){int count = 0;
          for(int j=0;j<m;j++){int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}}
                            }
	System.out.println(ans);
  }
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);       
		int n = sc.nextInt();
        int m = sc.nextInt(); 
        int c = sc.nextInt();
		int [] in = new int [m];
        int ans = 0;
        for(int i=0;i<m;i++){
                             in[i] = sc.nextInt();
                            }	
        for(int i=0;i<n;i++){int count = 0;
          for(int j=0;j<m;j++){int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}}
                            }
	System.out.println(ans);
  } main {
		Scanner sc = new Scanner(System.in);       
		int n = sc.nextInt();
        int m = sc.nextInt(); 
        int c = sc.nextInt();
		int [] in = new int [m];
        int ans = 0;
        for(int i=0;i<m;i++){
                             in[i] = sc.nextInt();
                            }	
        for(int i=0;i<n;i++){int count = 0;
          for(int j=0;j<m;j++){int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}}
                            }
	System.out.println(ans);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int m = sc.nextInt(); m sc.nextInt() sc.nextInt sc int c = sc.nextInt(); c sc.nextInt() sc.nextInt sc int [] in = new int [m]; in new int [m] m int ans = 0; ans 0 for(int i=0;i<m;i++){
                             in[i] = sc.nextInt();
                            } int i=0; int i=0; i 0 i<m i m i++ i++ i {
                             in[i] = sc.nextInt();
                            } {
                             in[i] = sc.nextInt();
                            } in[i] = sc.nextInt() in[i] in i sc.nextInt() sc.nextInt sc for(int i=0;i<n;i++){int count = 0;
          for(int j=0;j<m;j++){int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}}
                            } int i=0; int i=0; i 0 i<n i n i++ i++ i {int count = 0;
          for(int j=0;j<m;j++){int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}}
                            } {int count = 0;
          for(int j=0;j<m;j++){int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}}
                            } int count = 0; count 0 for(int j=0;j<m;j++){int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}} int j=0; int j=0; j 0 j<m j m j++ j++ j {int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}} {int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}} int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc count+=a*in[j] count a*in[j] a in[j] in j if(j==m-1 && count+c>0){ans++;} j==m-1 && count+c>0 j==m-1 j m-1 m 1 count+c>0 count+c count c 0 {ans++;} ans++ ans System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);       
		int n = sc.nextInt();
        int m = sc.nextInt(); 
        int c = sc.nextInt();
		int [] in = new int [m];
        int ans = 0;
        for(int i=0;i<m;i++){
                             in[i] = sc.nextInt();
                            }	
        for(int i=0;i<n;i++){int count = 0;
          for(int j=0;j<m;j++){int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}}
                            }
	System.out.println(ans);
  }
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);       
		int n = sc.nextInt();
        int m = sc.nextInt(); 
        int c = sc.nextInt();
		int [] in = new int [m];
        int ans = 0;
        for(int i=0;i<m;i++){
                             in[i] = sc.nextInt();
                            }	
        for(int i=0;i<n;i++){int count = 0;
          for(int j=0;j<m;j++){int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}}
                            }
	System.out.println(ans);
  }
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);       
		int n = sc.nextInt();
        int m = sc.nextInt(); 
        int c = sc.nextInt();
		int [] in = new int [m];
        int ans = 0;
        for(int i=0;i<m;i++){
                             in[i] = sc.nextInt();
                            }	
        for(int i=0;i<n;i++){int count = 0;
          for(int j=0;j<m;j++){int a = sc.nextInt();
                              count+=a*in[j];
                              if(j==m-1 && count+c>0){ans++;}}
                            }
	System.out.println(ans);
  }
}