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[] A = new int[M];
    for (int i = 0; i < M; i++){
      A[i] = sc.nextInt();
    }
    int ans = 0;
    for (int i = 0; i < N; i++){
      int s = 0;
      for (int j = 0; j < M; j++){
        int B = sc.nextInt();
        s += A[j] * B;
      }
      if (s+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[] A = new int[M];
    for (int i = 0; i < M; i++){
      A[i] = sc.nextInt();
    }
    int ans = 0;
    for (int i = 0; i < N; i++){
      int s = 0;
      for (int j = 0; j < M; j++){
        int B = sc.nextInt();
        s += A[j] * B;
      }
      if (s+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[] A = new int[M];
    for (int i = 0; i < M; i++){
      A[i] = sc.nextInt();
    }
    int ans = 0;
    for (int i = 0; i < N; i++){
      int s = 0;
      for (int j = 0; j < M; j++){
        int B = sc.nextInt();
        s += A[j] * B;
      }
      if (s+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[] A = new int[M];
    for (int i = 0; i < M; i++){
      A[i] = sc.nextInt();
    }
    int ans = 0;
    for (int i = 0; i < N; i++){
      int s = 0;
      for (int j = 0; j < M; j++){
        int B = sc.nextInt();
        s += A[j] * B;
      }
      if (s+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[] A = new int[M]; A new int[M] M for (int i = 0; i < M; i++){
      A[i] = sc.nextInt();
    } int i = 0; int i = 0; i 0 i < M i M i++ i++ i {
      A[i] = sc.nextInt();
    } {
      A[i] = sc.nextInt();
    } A[i] = sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc int ans = 0; ans 0 for (int i = 0; i < N; i++){
      int s = 0;
      for (int j = 0; j < M; j++){
        int B = sc.nextInt();
        s += A[j] * B;
      }
      if (s+C > 0) ans++;
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
      int s = 0;
      for (int j = 0; j < M; j++){
        int B = sc.nextInt();
        s += A[j] * B;
      }
      if (s+C > 0) ans++;
    } {
      int s = 0;
      for (int j = 0; j < M; j++){
        int B = sc.nextInt();
        s += A[j] * B;
      }
      if (s+C > 0) ans++;
    } int s = 0; s 0 for (int j = 0; j < M; j++){
        int B = sc.nextInt();
        s += A[j] * B;
      } int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
        int B = sc.nextInt();
        s += A[j] * B;
      } {
        int B = sc.nextInt();
        s += A[j] * B;
      } int B = sc.nextInt(); B sc.nextInt() sc.nextInt sc s += A[j] * B s A[j] * B A[j] A j B if (s+C > 0) ans++; s+C > 0 s+C s C 0 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[] A = new int[M];
    for (int i = 0; i < M; i++){
      A[i] = sc.nextInt();
    }
    int ans = 0;
    for (int i = 0; i < N; i++){
      int s = 0;
      for (int j = 0; j < M; j++){
        int B = sc.nextInt();
        s += A[j] * B;
      }
      if (s+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[] A = new int[M];
    for (int i = 0; i < M; i++){
      A[i] = sc.nextInt();
    }
    int ans = 0;
    for (int i = 0; i < N; i++){
      int s = 0;
      for (int j = 0; j < M; j++){
        int B = sc.nextInt();
        s += A[j] * B;
      }
      if (s+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[] A = new int[M];
    for (int i = 0; i < M; i++){
      A[i] = sc.nextInt();
    }
    int ans = 0;
    for (int i = 0; i < N; i++){
      int s = 0;
      for (int j = 0; j < M; j++){
        int B = sc.nextInt();
        s += A[j] * B;
      }
      if (s+C > 0) ans++;
    }
    System.out.println(ans);
  }
}
    