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];
    for(int i = 0;i<m;i++){
      b[i] = sc.nextInt();
    }
    int[][] a = new int[n][m];
    for(int i = 0;i<n;i++){
      for(int j = 0;j<m;j++){
        a[i][j] = sc.nextInt();
      }
    }
    int count = 0;
    for(int i = 0;i<n;i++){
      int code = c;
      for(int j = 0;j<m;j++){
        code += a[i][j]*b[j];
      }
      if(code>0)count++;
    }
    System.out.println(count);
  }
} 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];
    for(int i = 0;i<m;i++){
      b[i] = sc.nextInt();
    }
    int[][] a = new int[n][m];
    for(int i = 0;i<n;i++){
      for(int j = 0;j<m;j++){
        a[i][j] = sc.nextInt();
      }
    }
    int count = 0;
    for(int i = 0;i<n;i++){
      int code = c;
      for(int j = 0;j<m;j++){
        code += a[i][j]*b[j];
      }
      if(code>0)count++;
    }
    System.out.println(count);
  }
} 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];
    for(int i = 0;i<m;i++){
      b[i] = sc.nextInt();
    }
    int[][] a = new int[n][m];
    for(int i = 0;i<n;i++){
      for(int j = 0;j<m;j++){
        a[i][j] = sc.nextInt();
      }
    }
    int count = 0;
    for(int i = 0;i<n;i++){
      int code = c;
      for(int j = 0;j<m;j++){
        code += a[i][j]*b[j];
      }
      if(code>0)count++;
    }
    System.out.println(count);
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int m = sc.nextInt();
    int c = sc.nextInt();
    int[] b = new int[m];
    for(int i = 0;i<m;i++){
      b[i] = sc.nextInt();
    }
    int[][] a = new int[n][m];
    for(int i = 0;i<n;i++){
      for(int j = 0;j<m;j++){
        a[i][j] = sc.nextInt();
      }
    }
    int count = 0;
    for(int i = 0;i<n;i++){
      int code = c;
      for(int j = 0;j<m;j++){
        code += a[i][j]*b[j];
      }
      if(code>0)count++;
    }
    System.out.println(count);
  } 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 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 int[][] a = new int[n][m]; a new int[n][m] n m 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 int count = 0; count 0 for(int i = 0;i<n;i++){
      int code = c;
      for(int j = 0;j<m;j++){
        code += a[i][j]*b[j];
      }
      if(code>0)count++;
    } int i = 0; int i = 0; i 0 i<n i n i++ i++ i {
      int code = c;
      for(int j = 0;j<m;j++){
        code += a[i][j]*b[j];
      }
      if(code>0)count++;
    } {
      int code = c;
      for(int j = 0;j<m;j++){
        code += a[i][j]*b[j];
      }
      if(code>0)count++;
    } int code = c; code c for(int j = 0;j<m;j++){
        code += a[i][j]*b[j];
      } int j = 0; int j = 0; j 0 j<m j m j++ j++ j {
        code += a[i][j]*b[j];
      } {
        code += a[i][j]*b[j];
      } code += a[i][j]*b[j] code a[i][j]*b[j] a[i][j] a[i] a i j b[j] b j if(code>0)count++; code>0 code 0 count++ count System.out.println(count) System.out.println System.out System System.out count 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];
    for(int i = 0;i<m;i++){
      b[i] = sc.nextInt();
    }
    int[][] a = new int[n][m];
    for(int i = 0;i<n;i++){
      for(int j = 0;j<m;j++){
        a[i][j] = sc.nextInt();
      }
    }
    int count = 0;
    for(int i = 0;i<n;i++){
      int code = c;
      for(int j = 0;j<m;j++){
        code += a[i][j]*b[j];
      }
      if(code>0)count++;
    }
    System.out.println(count);
  }
} 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];
    for(int i = 0;i<m;i++){
      b[i] = sc.nextInt();
    }
    int[][] a = new int[n][m];
    for(int i = 0;i<n;i++){
      for(int j = 0;j<m;j++){
        a[i][j] = sc.nextInt();
      }
    }
    int count = 0;
    for(int i = 0;i<n;i++){
      int code = c;
      for(int j = 0;j<m;j++){
        code += a[i][j]*b[j];
      }
      if(code>0)count++;
    }
    System.out.println(count);
  }
} 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];
    for(int i = 0;i<m;i++){
      b[i] = sc.nextInt();
    }
    int[][] a = new int[n][m];
    for(int i = 0;i<n;i++){
      for(int j = 0;j<m;j++){
        a[i][j] = sc.nextInt();
      }
    }
    int count = 0;
    for(int i = 0;i<n;i++){
      int code = c;
      for(int j = 0;j<m;j++){
        code += a[i][j]*b[j];
      }
      if(code>0)count++;
    }
    System.out.println(count);
  }
}
