import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int c = scan.nextInt();
        int[] b = new int[m];
        for(int i = 0; i < m; i++) b[i] = scan.nextInt();
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++) for(int j = 0; j < m; j++) a[i][j] = scan.nextInt();
        int out = 0;
        for(int i = 0; i < n; i++){
            int sum = 0;
            for(int j = 0; j < m; j++){
                sum += a[i][j] * b[j];
            }
            sum += c;
            if(sum > 0) out++;
        }
        System.out.println(out);
        scan.close();
    }
} import java.util.*; util.* java public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int c = scan.nextInt();
        int[] b = new int[m];
        for(int i = 0; i < m; i++) b[i] = scan.nextInt();
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++) for(int j = 0; j < m; j++) a[i][j] = scan.nextInt();
        int out = 0;
        for(int i = 0; i < n; i++){
            int sum = 0;
            for(int j = 0; j < m; j++){
                sum += a[i][j] * b[j];
            }
            sum += c;
            if(sum > 0) out++;
        }
        System.out.println(out);
        scan.close();
    }
} Main public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int c = scan.nextInt();
        int[] b = new int[m];
        for(int i = 0; i < m; i++) b[i] = scan.nextInt();
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++) for(int j = 0; j < m; j++) a[i][j] = scan.nextInt();
        int out = 0;
        for(int i = 0; i < n; i++){
            int sum = 0;
            for(int j = 0; j < m; j++){
                sum += a[i][j] * b[j];
            }
            sum += c;
            if(sum > 0) out++;
        }
        System.out.println(out);
        scan.close();
    } main {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int c = scan.nextInt();
        int[] b = new int[m];
        for(int i = 0; i < m; i++) b[i] = scan.nextInt();
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++) for(int j = 0; j < m; j++) a[i][j] = scan.nextInt();
        int out = 0;
        for(int i = 0; i < n; i++){
            int sum = 0;
            for(int j = 0; j < m; j++){
                sum += a[i][j] * b[j];
            }
            sum += c;
            if(sum > 0) out++;
        }
        System.out.println(out);
        scan.close();
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int n = scan.nextInt(); n scan.nextInt() scan.nextInt scan int m = scan.nextInt(); m scan.nextInt() scan.nextInt scan int c = scan.nextInt(); c scan.nextInt() scan.nextInt scan int[] b = new int[m]; b new int[m] m for(int i = 0; i < m; i++) b[i] = scan.nextInt(); int i = 0; int i = 0; i 0 i < m i m i++ i++ i b[i] = scan.nextInt(); b[i] = scan.nextInt() b[i] b i scan.nextInt() scan.nextInt scan int[][] a = new int[n][m]; a new int[n][m] n m for(int i = 0; i < n; i++) for(int j = 0; j < m; j++) a[i][j] = scan.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] = scan.nextInt(); for(int j = 0; j < m; j++) a[i][j] = scan.nextInt(); int j = 0; int j = 0; j 0 j < m j m j++ j++ j a[i][j] = scan.nextInt(); a[i][j] = scan.nextInt() a[i][j] a[i] a i j scan.nextInt() scan.nextInt scan int out = 0; out 0 for(int i = 0; i < n; i++){
            int sum = 0;
            for(int j = 0; j < m; j++){
                sum += a[i][j] * b[j];
            }
            sum += c;
            if(sum > 0) out++;
        } 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 += a[i][j] * b[j];
            }
            sum += c;
            if(sum > 0) out++;
        } {
            int sum = 0;
            for(int j = 0; j < m; j++){
                sum += a[i][j] * b[j];
            }
            sum += c;
            if(sum > 0) out++;
        } int sum = 0; sum 0 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 sum += c sum c if(sum > 0) out++; sum > 0 sum 0 out++ out System.out.println(out) System.out.println System.out System System.out out scan.close() scan.close scan String[] args args public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int c = scan.nextInt();
        int[] b = new int[m];
        for(int i = 0; i < m; i++) b[i] = scan.nextInt();
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++) for(int j = 0; j < m; j++) a[i][j] = scan.nextInt();
        int out = 0;
        for(int i = 0; i < n; i++){
            int sum = 0;
            for(int j = 0; j < m; j++){
                sum += a[i][j] * b[j];
            }
            sum += c;
            if(sum > 0) out++;
        }
        System.out.println(out);
        scan.close();
    }
} public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int c = scan.nextInt();
        int[] b = new int[m];
        for(int i = 0; i < m; i++) b[i] = scan.nextInt();
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++) for(int j = 0; j < m; j++) a[i][j] = scan.nextInt();
        int out = 0;
        for(int i = 0; i < n; i++){
            int sum = 0;
            for(int j = 0; j < m; j++){
                sum += a[i][j] * b[j];
            }
            sum += c;
            if(sum > 0) out++;
        }
        System.out.println(out);
        scan.close();
    }
} Main
import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int c = scan.nextInt();
        int[] b = new int[m];
        for(int i = 0; i < m; i++) b[i] = scan.nextInt();
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++) for(int j = 0; j < m; j++) a[i][j] = scan.nextInt();
        int out = 0;
        for(int i = 0; i < n; i++){
            int sum = 0;
            for(int j = 0; j < m; j++){
                sum += a[i][j] * b[j];
            }
            sum += c;
            if(sum > 0) out++;
        }
        System.out.println(out);
        scan.close();
    }
}
