import java.util.Scanner;
import java.util.ArrayList;
import java.util.Collections;

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 cnt = 0;
    int total = 0;

    int[] A = new int[M];
    for (int i = 0; i < M; i++) {
      A[i] = sc.nextInt();
    }

    for (int i = 0; i < N; i++) {
      total = 0;
      for (int j = 0; j < M; j++) {
        total += A[j] * sc.nextInt();
      }
      if (total + C > 0) {
        cnt++;
      }
    }
    System.out.println(cnt);
  }
} import java.util.Scanner; Scanner java.util import java.util.ArrayList; ArrayList java.util import java.util.Collections; Collections 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 cnt = 0;
    int total = 0;

    int[] A = new int[M];
    for (int i = 0; i < M; i++) {
      A[i] = sc.nextInt();
    }

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

    int[] A = new int[M];
    for (int i = 0; i < M; i++) {
      A[i] = sc.nextInt();
    }

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

    int[] A = new int[M];
    for (int i = 0; i < M; i++) {
      A[i] = sc.nextInt();
    }

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

    int[] A = new int[M];
    for (int i = 0; i < M; i++) {
      A[i] = sc.nextInt();
    }

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

    int[] A = new int[M];
    for (int i = 0; i < M; i++) {
      A[i] = sc.nextInt();
    }

    for (int i = 0; i < N; i++) {
      total = 0;
      for (int j = 0; j < M; j++) {
        total += A[j] * sc.nextInt();
      }
      if (total + C > 0) {
        cnt++;
      }
    }
    System.out.println(cnt);
  }
} Main
import java.util.Scanner;
import java.util.ArrayList;
import java.util.Collections;

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 cnt = 0;
    int total = 0;

    int[] A = new int[M];
    for (int i = 0; i < M; i++) {
      A[i] = sc.nextInt();
    }

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