import java.util.*;
import java.util.TreeMap;

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();
    ArrayList<Integer> list = new ArrayList<Integer>();
    int ans = 0;
    for (int i = 0; i < M; i++) {
      list.add(sc.nextInt());
    }
    for (int i = 0; i < N; i++) {
      int total = 0;
      for (int j = 0; j < M; j++) {
        total += list.get(j) * sc.nextInt();
      }
      if (total + C > 0) {
        ans++;
      }
    }
    System.out.println(ans);
  }
} import java.util.*; util.* java import java.util.TreeMap; TreeMap 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();
    ArrayList<Integer> list = new ArrayList<Integer>();
    int ans = 0;
    for (int i = 0; i < M; i++) {
      list.add(sc.nextInt());
    }
    for (int i = 0; i < N; i++) {
      int total = 0;
      for (int j = 0; j < M; j++) {
        total += list.get(j) * sc.nextInt();
      }
      if (total + 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();
    ArrayList<Integer> list = new ArrayList<Integer>();
    int ans = 0;
    for (int i = 0; i < M; i++) {
      list.add(sc.nextInt());
    }
    for (int i = 0; i < N; i++) {
      int total = 0;
      for (int j = 0; j < M; j++) {
        total += list.get(j) * sc.nextInt();
      }
      if (total + 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();
    ArrayList<Integer> list = new ArrayList<Integer>();
    int ans = 0;
    for (int i = 0; i < M; i++) {
      list.add(sc.nextInt());
    }
    for (int i = 0; i < N; i++) {
      int total = 0;
      for (int j = 0; j < M; j++) {
        total += list.get(j) * sc.nextInt();
      }
      if (total + 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 ArrayList<Integer> list = new ArrayList<Integer>(); list new ArrayList<Integer>() int ans = 0; ans 0 for (int i = 0; i < M; i++) {
      list.add(sc.nextInt());
    } int i = 0; int i = 0; i 0 i < M i M i++ i++ i {
      list.add(sc.nextInt());
    } {
      list.add(sc.nextInt());
    } list.add(sc.nextInt()) list.add list sc.nextInt() sc.nextInt sc for (int i = 0; i < N; i++) {
      int total = 0;
      for (int j = 0; j < M; j++) {
        total += list.get(j) * sc.nextInt();
      }
      if (total + C > 0) {
        ans++;
      }
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
      int total = 0;
      for (int j = 0; j < M; j++) {
        total += list.get(j) * sc.nextInt();
      }
      if (total + C > 0) {
        ans++;
      }
    } {
      int total = 0;
      for (int j = 0; j < M; j++) {
        total += list.get(j) * sc.nextInt();
      }
      if (total + C > 0) {
        ans++;
      }
    } int total = 0; total 0 for (int j = 0; j < M; j++) {
        total += list.get(j) * sc.nextInt();
      } int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
        total += list.get(j) * sc.nextInt();
      } {
        total += list.get(j) * sc.nextInt();
      } total += list.get(j) * sc.nextInt() total list.get(j) * sc.nextInt() list.get(j) list.get list j sc.nextInt() sc.nextInt sc if (total + C > 0) {
        ans++;
      } total + C > 0 total + C total C 0 {
        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();
    ArrayList<Integer> list = new ArrayList<Integer>();
    int ans = 0;
    for (int i = 0; i < M; i++) {
      list.add(sc.nextInt());
    }
    for (int i = 0; i < N; i++) {
      int total = 0;
      for (int j = 0; j < M; j++) {
        total += list.get(j) * sc.nextInt();
      }
      if (total + 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();
    ArrayList<Integer> list = new ArrayList<Integer>();
    int ans = 0;
    for (int i = 0; i < M; i++) {
      list.add(sc.nextInt());
    }
    for (int i = 0; i < N; i++) {
      int total = 0;
      for (int j = 0; j < M; j++) {
        total += list.get(j) * sc.nextInt();
      }
      if (total + C > 0) {
        ans++;
      }
    }
    System.out.println(ans);
  }
} Main
import java.util.*;
import java.util.TreeMap;

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();
    ArrayList<Integer> list = new ArrayList<Integer>();
    int ans = 0;
    for (int i = 0; i < M; i++) {
      list.add(sc.nextInt());
    }
    for (int i = 0; i < N; i++) {
      int total = 0;
      for (int j = 0; j < M; j++) {
        total += list.get(j) * sc.nextInt();
      }
      if (total + C > 0) {
        ans++;
      }
    }
    System.out.println(ans);
  }
}
