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[] b = new int[m];
        for(int i = 0; i < m; i++){
            b[i] = sc.nextInt();
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = sc.nextInt();
            }
        }
        int sum = 0;
        int count = 0;
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                sum = sum + a[i][j] * b[j];
            }
            if(sum + c > 0){
                count++;
            }
            sum = 0;
        }
        System.out.print(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[] b = new int[m];
        for(int i = 0; i < m; i++){
            b[i] = sc.nextInt();
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = sc.nextInt();
            }
        }
        int sum = 0;
        int count = 0;
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                sum = sum + a[i][j] * b[j];
            }
            if(sum + c > 0){
                count++;
            }
            sum = 0;
        }
        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];
        for(int i = 0; i < m; i++){
            b[i] = sc.nextInt();
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = sc.nextInt();
            }
        }
        int sum = 0;
        int count = 0;
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                sum = sum + a[i][j] * b[j];
            }
            if(sum + c > 0){
                count++;
            }
            sum = 0;
        }
        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];
        for(int i = 0; i < m; i++){
            b[i] = sc.nextInt();
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = sc.nextInt();
            }
        }
        int sum = 0;
        int count = 0;
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                sum = sum + a[i][j] * b[j];
            }
            if(sum + c > 0){
                count++;
            }
            sum = 0;
        }
        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 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 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] = 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 sum = 0; sum 0 int count = 0; count 0 for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                sum = sum + a[i][j] * b[j];
            }
            if(sum + c > 0){
                count++;
            }
            sum = 0;
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            for(int j = 0; j < m; j++){
                sum = sum + a[i][j] * b[j];
            }
            if(sum + c > 0){
                count++;
            }
            sum = 0;
        } {
            for(int j = 0; j < m; j++){
                sum = sum + a[i][j] * b[j];
            }
            if(sum + c > 0){
                count++;
            }
            sum = 0;
        } for(int j = 0; j < m; j++){
                sum = sum + a[i][j] * b[j];
            } int j = 0; int j = 0; j 0 j < m j m j++ j++ j {
                sum = sum + a[i][j] * b[j];
            } {
                sum = sum + a[i][j] * b[j];
            } sum = sum + a[i][j] * b[j] sum 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){
                count++;
            } sum + c > 0 sum + c sum c 0 {
                count++;
            } count++ count sum = 0 sum 0 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];
        for(int i = 0; i < m; i++){
            b[i] = sc.nextInt();
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = sc.nextInt();
            }
        }
        int sum = 0;
        int count = 0;
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                sum = sum + a[i][j] * b[j];
            }
            if(sum + c > 0){
                count++;
            }
            sum = 0;
        }
        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];
        for(int i = 0; i < m; i++){
            b[i] = sc.nextInt();
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = sc.nextInt();
            }
        }
        int sum = 0;
        int count = 0;
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                sum = sum + a[i][j] * b[j];
            }
            if(sum + c > 0){
                count++;
            }
            sum = 0;
        }
        System.out.print(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[] b = new int[m];
        for(int i = 0; i < m; i++){
            b[i] = sc.nextInt();
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = sc.nextInt();
            }
        }
        int sum = 0;
        int count = 0;
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                sum = sum + a[i][j] * b[j];
            }
            if(sum + c > 0){
                count++;
            }
            sum = 0;
        }
        System.out.print(count);
    }
}