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[][] A = new int[N][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();
      }
    }
    int count = 0;
    for(int i=0; i<N; i++){
      int wa = C;
      for(int j=0; j<M; j++){
        wa += B[j] * A[i][j];
      }
      if(wa > 0){
        count++;
      }
    }
    System.out.print(count);
  }
} 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[][] A = new int[N][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();
      }
    }
    int count = 0;
    for(int i=0; i<N; i++){
      int wa = C;
      for(int j=0; j<M; j++){
        wa += B[j] * A[i][j];
      }
      if(wa > 0){
        count++;
      }
    }
    System.out.print(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];
    int[][] A = new int[N][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();
      }
    }
    int count = 0;
    for(int i=0; i<N; i++){
      int wa = C;
      for(int j=0; j<M; j++){
        wa += B[j] * A[i][j];
      }
      if(wa > 0){
        count++;
      }
    }
    System.out.print(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];
    int[][] A = new int[N][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();
      }
    }
    int count = 0;
    for(int i=0; i<N; i++){
      int wa = C;
      for(int j=0; j<M; j++){
        wa += B[j] * A[i][j];
      }
      if(wa > 0){
        count++;
      }
    }
    System.out.print(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 int[][] A = new int[N][M]; A new int[N][M] N 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 int count = 0; count 0 for(int i=0; i<N; i++){
      int wa = C;
      for(int j=0; j<M; j++){
        wa += B[j] * A[i][j];
      }
      if(wa > 0){
        count++;
      }
    } int i=0; int i=0; i 0 i<N i N i++ i++ i {
      int wa = C;
      for(int j=0; j<M; j++){
        wa += B[j] * A[i][j];
      }
      if(wa > 0){
        count++;
      }
    } {
      int wa = C;
      for(int j=0; j<M; j++){
        wa += B[j] * A[i][j];
      }
      if(wa > 0){
        count++;
      }
    } int wa = C; wa C for(int j=0; j<M; j++){
        wa += B[j] * A[i][j];
      } int j=0; int j=0; j 0 j<M j M j++ j++ j {
        wa += B[j] * A[i][j];
      } {
        wa += B[j] * A[i][j];
      } wa += B[j] * A[i][j] wa B[j] * A[i][j] B[j] B j A[i][j] A[i] A i j if(wa > 0){
        count++;
      } wa > 0 wa 0 {
        count++;
      } count++ count System.out.print(count) System.out.print 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];
    int[][] A = new int[N][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();
      }
    }
    int count = 0;
    for(int i=0; i<N; i++){
      int wa = C;
      for(int j=0; j<M; j++){
        wa += B[j] * A[i][j];
      }
      if(wa > 0){
        count++;
      }
    }
    System.out.print(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];
    int[][] A = new int[N][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();
      }
    }
    int count = 0;
    for(int i=0; i<N; i++){
      int wa = C;
      for(int j=0; j<M; j++){
        wa += B[j] * A[i][j];
      }
      if(wa > 0){
        count++;
      }
    }
    System.out.print(count);
  }
} 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[][] A = new int[N][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();
      }
    }
    int count = 0;
    for(int i=0; i<N; i++){
      int wa = C;
      for(int j=0; j<M; j++){
        wa += B[j] * A[i][j];
      }
      if(wa > 0){
        count++;
      }
    }
    System.out.print(count);
  }
}
