
import java.util.Scanner;

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

import java.util.Scanner;

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