import java.util.Scanner;

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 ans = 0;

    for (int i = 0; i < m; i++) {
      b[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      int sum = 0;
      for (int j = 0; j < m; j++) {
        sum += sc.nextInt() * b[j];
      }
      if (sum > (-1 * c)) {
        ans++;
      }
    }

    System.out.println(ans);

  }
} import java.util.Scanner; Scanner 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 ans = 0;

    for (int i = 0; i < m; i++) {
      b[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      int sum = 0;
      for (int j = 0; j < m; j++) {
        sum += sc.nextInt() * b[j];
      }
      if (sum > (-1 * c)) {
        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[] b = new int[m];
    int ans = 0;

    for (int i = 0; i < m; i++) {
      b[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      int sum = 0;
      for (int j = 0; j < m; j++) {
        sum += sc.nextInt() * b[j];
      }
      if (sum > (-1 * c)) {
        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[] b = new int[m];
    int ans = 0;

    for (int i = 0; i < m; i++) {
      b[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      int sum = 0;
      for (int j = 0; j < m; j++) {
        sum += sc.nextInt() * b[j];
      }
      if (sum > (-1 * c)) {
        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[] b = new int[m]; b new int[m] m int ans = 0; ans 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++) {
      int sum = 0;
      for (int j = 0; j < m; j++) {
        sum += sc.nextInt() * b[j];
      }
      if (sum > (-1 * c)) {
        ans++;
      }
    } 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 += sc.nextInt() * b[j];
      }
      if (sum > (-1 * c)) {
        ans++;
      }
    } {
      int sum = 0;
      for (int j = 0; j < m; j++) {
        sum += sc.nextInt() * b[j];
      }
      if (sum > (-1 * c)) {
        ans++;
      }
    } int sum = 0; sum 0 for (int j = 0; j < m; j++) {
        sum += sc.nextInt() * b[j];
      } int j = 0; int j = 0; j 0 j < m j m j++ j++ j {
        sum += sc.nextInt() * b[j];
      } {
        sum += sc.nextInt() * b[j];
      } sum += sc.nextInt() * b[j] sum sc.nextInt() * b[j] sc.nextInt() sc.nextInt sc b[j] b j if (sum > (-1 * c)) {
        ans++;
      } sum > (-1 * c) sum (-1 * c) -1 1 c {
        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[] b = new int[m];
    int ans = 0;

    for (int i = 0; i < m; i++) {
      b[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      int sum = 0;
      for (int j = 0; j < m; j++) {
        sum += sc.nextInt() * b[j];
      }
      if (sum > (-1 * c)) {
        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[] b = new int[m];
    int ans = 0;

    for (int i = 0; i < m; i++) {
      b[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      int sum = 0;
      for (int j = 0; j < m; j++) {
        sum += sc.nextInt() * b[j];
      }
      if (sum > (-1 * c)) {
        ans++;
      }
    }

    System.out.println(ans);

  }
} Main
import java.util.Scanner;

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 ans = 0;

    for (int i = 0; i < m; i++) {
      b[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      int sum = 0;
      for (int j = 0; j < m; j++) {
        sum += sc.nextInt() * b[j];
      }
      if (sum > (-1 * c)) {
        ans++;
      }
    }

    System.out.println(ans);

  }
}