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[][] A = new int[N][M];
    int[] B = new int[M];

    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();
      }
    }

    sc.close();

    int count = 0;

    for (int i = 0; i < N; i++) {
      int sum = C;
      for (int j = 0; j < M; j++) {
        sum += A[i][j] * B[j]; 
      }
      if (0 < sum) {
        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[][] A = new int[N][M];
    int[] B = new int[M];

    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();
      }
    }

    sc.close();

    int count = 0;

    for (int i = 0; i < N; i++) {
      int sum = C;
      for (int j = 0; j < M; j++) {
        sum += A[i][j] * B[j]; 
      }
      if (0 < sum) {
        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[][] A = new int[N][M];
    int[] B = new int[M];

    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();
      }
    }

    sc.close();

    int count = 0;

    for (int i = 0; i < N; i++) {
      int sum = C;
      for (int j = 0; j < M; j++) {
        sum += A[i][j] * B[j]; 
      }
      if (0 < sum) {
        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[][] A = new int[N][M];
    int[] B = new int[M];

    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();
      }
    }

    sc.close();

    int count = 0;

    for (int i = 0; i < N; i++) {
      int sum = C;
      for (int j = 0; j < M; j++) {
        sum += A[i][j] * B[j]; 
      }
      if (0 < sum) {
        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[][] A = new int[N][M]; A new int[N][M] N M 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 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 sc.close() sc.close sc int count = 0; count 0 for (int i = 0; i < N; i++) {
      int sum = C;
      for (int j = 0; j < M; j++) {
        sum += A[i][j] * B[j]; 
      }
      if (0 < sum) {
        count++;
      }
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
      int sum = C;
      for (int j = 0; j < M; j++) {
        sum += A[i][j] * B[j]; 
      }
      if (0 < sum) {
        count++;
      }
    } {
      int sum = C;
      for (int j = 0; j < M; j++) {
        sum += A[i][j] * B[j]; 
      }
      if (0 < sum) {
        count++;
      }
    } int sum = C; sum C for (int j = 0; j < M; j++) {
        sum += A[i][j] * B[j]; 
      } int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
        sum += A[i][j] * B[j]; 
      } {
        sum += A[i][j] * B[j]; 
      } 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 (0 < sum) {
        count++;
      } 0 < sum 0 sum {
        count++;
      } 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[][] A = new int[N][M];
    int[] B = new int[M];

    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();
      }
    }

    sc.close();

    int count = 0;

    for (int i = 0; i < N; i++) {
      int sum = C;
      for (int j = 0; j < M; j++) {
        sum += A[i][j] * B[j]; 
      }
      if (0 < sum) {
        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[][] A = new int[N][M];
    int[] B = new int[M];

    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();
      }
    }

    sc.close();

    int count = 0;

    for (int i = 0; i < N; i++) {
      int sum = C;
      for (int j = 0; j < M; j++) {
        sum += A[i][j] * B[j]; 
      }
      if (0 < sum) {
        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[][] A = new int[N][M];
    int[] B = new int[M];

    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();
      }
    }

    sc.close();

    int count = 0;

    for (int i = 0; i < N; i++) {
      int sum = C;
      for (int j = 0; j < M; j++) {
        sum += A[i][j] * B[j]; 
      }
      if (0 < sum) {
        count++;
      }
    }
    

    System.out.println(count);

  }

}