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 B[] = new int[M];
    int A[][] = new int[N][M];
    int answer =0;
    for(int i=0;i<M;i++){
      B[i]=sc.nextInt();
    }
    for(int i=0;i<N;i++){
      for(int j=0;j<M;j++){
        A[i][j]=sc.nextInt();
      }
    }
    
    for(int i=0;i<N;i++){
      int sum=0;
      for(int j=0;j<M;j++){
        sum = sum+A[i][j]*B[j];
      }
      if(sum+C>0){
        answer=answer+1;
      }
    }
    System.out.println(answer);
      
      
      
      
      
      
    
    
  }
  

  
} 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 B[] = new int[M];
    int A[][] = new int[N][M];
    int answer =0;
    for(int i=0;i<M;i++){
      B[i]=sc.nextInt();
    }
    for(int i=0;i<N;i++){
      for(int j=0;j<M;j++){
        A[i][j]=sc.nextInt();
      }
    }
    
    for(int i=0;i<N;i++){
      int sum=0;
      for(int j=0;j<M;j++){
        sum = sum+A[i][j]*B[j];
      }
      if(sum+C>0){
        answer=answer+1;
      }
    }
    System.out.println(answer);
      
      
      
      
      
      
    
    
  }
  

  
} 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 B[] = new int[M];
    int A[][] = new int[N][M];
    int answer =0;
    for(int i=0;i<M;i++){
      B[i]=sc.nextInt();
    }
    for(int i=0;i<N;i++){
      for(int j=0;j<M;j++){
        A[i][j]=sc.nextInt();
      }
    }
    
    for(int i=0;i<N;i++){
      int sum=0;
      for(int j=0;j<M;j++){
        sum = sum+A[i][j]*B[j];
      }
      if(sum+C>0){
        answer=answer+1;
      }
    }
    System.out.println(answer);
      
      
      
      
      
      
    
    
  } main {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int C = sc.nextInt();
    int B[] = new int[M];
    int A[][] = new int[N][M];
    int answer =0;
    for(int i=0;i<M;i++){
      B[i]=sc.nextInt();
    }
    for(int i=0;i<N;i++){
      for(int j=0;j<M;j++){
        A[i][j]=sc.nextInt();
      }
    }
    
    for(int i=0;i<N;i++){
      int sum=0;
      for(int j=0;j<M;j++){
        sum = sum+A[i][j]*B[j];
      }
      if(sum+C>0){
        answer=answer+1;
      }
    }
    System.out.println(answer);
      
      
      
      
      
      
    
    
  } 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 B[] = new int[M]; B new int[M] M int A[][] = new int[N][M]; A new int[N][M] N M int answer =0; answer 0 for(int i=0;i<M;i++){
      B[i]=sc.nextInt();
    } int i=0; int i=0; i 0 i<M i M i++ i++ i {
      B[i]=sc.nextInt();
    } {
      B[i]=sc.nextInt();
    } B[i]=sc.nextInt() B[i] B i sc.nextInt() sc.nextInt sc for(int i=0;i<N;i++){
      for(int j=0;j<M;j++){
        A[i][j]=sc.nextInt();
      }
    } int i=0; int i=0; i 0 i<N i N i++ i++ i {
      for(int j=0;j<M;j++){
        A[i][j]=sc.nextInt();
      }
    } {
      for(int j=0;j<M;j++){
        A[i][j]=sc.nextInt();
      }
    } for(int j=0;j<M;j++){
        A[i][j]=sc.nextInt();
      } int j=0; int j=0; j 0 j<M j M j++ j++ j {
        A[i][j]=sc.nextInt();
      } {
        A[i][j]=sc.nextInt();
      } A[i][j]=sc.nextInt() A[i][j] A[i] A i j sc.nextInt() sc.nextInt sc for(int i=0;i<N;i++){
      int sum=0;
      for(int j=0;j<M;j++){
        sum = sum+A[i][j]*B[j];
      }
      if(sum+C>0){
        answer=answer+1;
      }
    } int i=0; int i=0; i 0 i<N i N i++ i++ i {
      int sum=0;
      for(int j=0;j<M;j++){
        sum = sum+A[i][j]*B[j];
      }
      if(sum+C>0){
        answer=answer+1;
      }
    } {
      int sum=0;
      for(int j=0;j<M;j++){
        sum = sum+A[i][j]*B[j];
      }
      if(sum+C>0){
        answer=answer+1;
      }
    } int sum=0; sum 0 for(int j=0;j<M;j++){
        sum = sum+A[i][j]*B[j];
      } int j=0; int j=0; j 0 j<M j M j++ j++ j {
        sum = sum+A[i][j]*B[j];
      } {
        sum = sum+A[i][j]*B[j];
      } sum = sum+A[i][j]*B[j] sum sum+A[i][j]*B[j] sum A[i][j]*B[j] A[i][j] A[i] A i j B[j] B j if(sum+C>0){
        answer=answer+1;
      } sum+C>0 sum+C sum C 0 {
        answer=answer+1;
      } answer=answer+1 answer answer+1 answer 1 System.out.println(answer) System.out.println System.out System System.out answer 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 B[] = new int[M];
    int A[][] = new int[N][M];
    int answer =0;
    for(int i=0;i<M;i++){
      B[i]=sc.nextInt();
    }
    for(int i=0;i<N;i++){
      for(int j=0;j<M;j++){
        A[i][j]=sc.nextInt();
      }
    }
    
    for(int i=0;i<N;i++){
      int sum=0;
      for(int j=0;j<M;j++){
        sum = sum+A[i][j]*B[j];
      }
      if(sum+C>0){
        answer=answer+1;
      }
    }
    System.out.println(answer);
      
      
      
      
      
      
    
    
  }
  

  
} 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 B[] = new int[M];
    int A[][] = new int[N][M];
    int answer =0;
    for(int i=0;i<M;i++){
      B[i]=sc.nextInt();
    }
    for(int i=0;i<N;i++){
      for(int j=0;j<M;j++){
        A[i][j]=sc.nextInt();
      }
    }
    
    for(int i=0;i<N;i++){
      int sum=0;
      for(int j=0;j<M;j++){
        sum = sum+A[i][j]*B[j];
      }
      if(sum+C>0){
        answer=answer+1;
      }
    }
    System.out.println(answer);
      
      
      
      
      
      
    
    
  }
  

  
} 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 B[] = new int[M];
    int A[][] = new int[N][M];
    int answer =0;
    for(int i=0;i<M;i++){
      B[i]=sc.nextInt();
    }
    for(int i=0;i<N;i++){
      for(int j=0;j<M;j++){
        A[i][j]=sc.nextInt();
      }
    }
    
    for(int i=0;i<N;i++){
      int sum=0;
      for(int j=0;j<M;j++){
        sum = sum+A[i][j]*B[j];
      }
      if(sum+C>0){
        answer=answer+1;
      }
    }
    System.out.println(answer);
      
      
      
      
      
      
    
    
  }
  

  
}