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();
        sc.nextLine();
        int b[] = new int[m];

        for(int i = 0;i<m;i++){
            b[i] = sc.nextInt();
        }
        sc.nextLine();

        int ans = 0;
        int tmp = 0;
        for(int i = 0;i<n;i++){
            for(int j = 0;j<m;j++){
                tmp += sc.nextInt()*b[j];
            }
            sc.nextLine();
            if(tmp + c > 0){
                ans++;
            }
            tmp = 0;
        }

        System.out.println(ans);
    }
} 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();
        sc.nextLine();
        int b[] = new int[m];

        for(int i = 0;i<m;i++){
            b[i] = sc.nextInt();
        }
        sc.nextLine();

        int ans = 0;
        int tmp = 0;
        for(int i = 0;i<n;i++){
            for(int j = 0;j<m;j++){
                tmp += sc.nextInt()*b[j];
            }
            sc.nextLine();
            if(tmp + c > 0){
                ans++;
            }
            tmp = 0;
        }

        System.out.println(ans);
    }
} 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();
        sc.nextLine();
        int b[] = new int[m];

        for(int i = 0;i<m;i++){
            b[i] = sc.nextInt();
        }
        sc.nextLine();

        int ans = 0;
        int tmp = 0;
        for(int i = 0;i<n;i++){
            for(int j = 0;j<m;j++){
                tmp += sc.nextInt()*b[j];
            }
            sc.nextLine();
            if(tmp + c > 0){
                ans++;
            }
            tmp = 0;
        }

        System.out.println(ans);
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int c = sc.nextInt();
        sc.nextLine();
        int b[] = new int[m];

        for(int i = 0;i<m;i++){
            b[i] = sc.nextInt();
        }
        sc.nextLine();

        int ans = 0;
        int tmp = 0;
        for(int i = 0;i<n;i++){
            for(int j = 0;j<m;j++){
                tmp += sc.nextInt()*b[j];
            }
            sc.nextLine();
            if(tmp + c > 0){
                ans++;
            }
            tmp = 0;
        }

        System.out.println(ans);
    } 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 sc.nextLine() sc.nextLine 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 sc.nextLine() sc.nextLine sc int ans = 0; ans 0 int tmp = 0; tmp 0 for(int i = 0;i<n;i++){
            for(int j = 0;j<m;j++){
                tmp += sc.nextInt()*b[j];
            }
            sc.nextLine();
            if(tmp + c > 0){
                ans++;
            }
            tmp = 0;
        } int i = 0; int i = 0; i 0 i<n i n i++ i++ i {
            for(int j = 0;j<m;j++){
                tmp += sc.nextInt()*b[j];
            }
            sc.nextLine();
            if(tmp + c > 0){
                ans++;
            }
            tmp = 0;
        } {
            for(int j = 0;j<m;j++){
                tmp += sc.nextInt()*b[j];
            }
            sc.nextLine();
            if(tmp + c > 0){
                ans++;
            }
            tmp = 0;
        } for(int j = 0;j<m;j++){
                tmp += sc.nextInt()*b[j];
            } int j = 0; int j = 0; j 0 j<m j m j++ j++ j {
                tmp += sc.nextInt()*b[j];
            } {
                tmp += sc.nextInt()*b[j];
            } tmp += sc.nextInt()*b[j] tmp sc.nextInt()*b[j] sc.nextInt() sc.nextInt sc b[j] b j sc.nextLine() sc.nextLine sc if(tmp + c > 0){
                ans++;
            } tmp + c > 0 tmp + c tmp c 0 {
                ans++;
            } ans++ ans tmp = 0 tmp 0 System.out.println(ans) System.out.println System.out System System.out ans 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();
        sc.nextLine();
        int b[] = new int[m];

        for(int i = 0;i<m;i++){
            b[i] = sc.nextInt();
        }
        sc.nextLine();

        int ans = 0;
        int tmp = 0;
        for(int i = 0;i<n;i++){
            for(int j = 0;j<m;j++){
                tmp += sc.nextInt()*b[j];
            }
            sc.nextLine();
            if(tmp + c > 0){
                ans++;
            }
            tmp = 0;
        }

        System.out.println(ans);
    }
} 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();
        sc.nextLine();
        int b[] = new int[m];

        for(int i = 0;i<m;i++){
            b[i] = sc.nextInt();
        }
        sc.nextLine();

        int ans = 0;
        int tmp = 0;
        for(int i = 0;i<n;i++){
            for(int j = 0;j<m;j++){
                tmp += sc.nextInt()*b[j];
            }
            sc.nextLine();
            if(tmp + c > 0){
                ans++;
            }
            tmp = 0;
        }

        System.out.println(ans);
    }
} 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();
        sc.nextLine();
        int b[] = new int[m];

        for(int i = 0;i<m;i++){
            b[i] = sc.nextInt();
        }
        sc.nextLine();

        int ans = 0;
        int tmp = 0;
        for(int i = 0;i<n;i++){
            for(int j = 0;j<m;j++){
                tmp += sc.nextInt()*b[j];
            }
            sc.nextLine();
            if(tmp + c > 0){
                ans++;
            }
            tmp = 0;
        }

        System.out.println(ans);
    }
}