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];
        for(int i = 0; i < m; i++){
            b[i] = Integer.parseInt(sc.next());
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = Integer.parseInt(sc.next());
            }
        }
        
        int count = 0;
        for(int i = 0; i < n; i++){
            int code = c;
            for(int j = 0; j < m; j++){
                code += a[i][j] * b[j];
            }
            if(code > 0){
                count++;
            }
        }
        
        System.out.println(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 = Integer.parseInt(sc.next());
        int m = Integer.parseInt(sc.next());
        int c = Integer.parseInt(sc.next());
        int[] b = new int[m];
        for(int i = 0; i < m; i++){
            b[i] = Integer.parseInt(sc.next());
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = Integer.parseInt(sc.next());
            }
        }
        
        int count = 0;
        for(int i = 0; i < n; i++){
            int code = c;
            for(int j = 0; j < m; j++){
                code += a[i][j] * b[j];
            }
            if(code > 0){
                count++;
            }
        }
        
        System.out.println(count);
    }
} 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];
        for(int i = 0; i < m; i++){
            b[i] = Integer.parseInt(sc.next());
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = Integer.parseInt(sc.next());
            }
        }
        
        int count = 0;
        for(int i = 0; i < n; i++){
            int code = c;
            for(int j = 0; j < m; j++){
                code += a[i][j] * b[j];
            }
            if(code > 0){
                count++;
            }
        }
        
        System.out.println(count);
    } 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];
        for(int i = 0; i < m; i++){
            b[i] = Integer.parseInt(sc.next());
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = Integer.parseInt(sc.next());
            }
        }
        
        int count = 0;
        for(int i = 0; i < n; i++){
            int code = c;
            for(int j = 0; j < m; j++){
                code += a[i][j] * b[j];
            }
            if(code > 0){
                count++;
            }
        }
        
        System.out.println(count);
    } 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 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] = Integer.parseInt(sc.next()) b[i] b i Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next 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] = 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 count = 0; count 0 for(int i = 0; i < n; i++){
            int code = c;
            for(int j = 0; j < m; j++){
                code += a[i][j] * b[j];
            }
            if(code > 0){
                count++;
            }
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            int code = c;
            for(int j = 0; j < m; j++){
                code += a[i][j] * b[j];
            }
            if(code > 0){
                count++;
            }
        } {
            int code = c;
            for(int j = 0; j < m; j++){
                code += a[i][j] * b[j];
            }
            if(code > 0){
                count++;
            }
        } int code = c; code c for(int j = 0; j < m; j++){
                code += a[i][j] * b[j];
            } int j = 0; int j = 0; j 0 j < m j m j++ j++ j {
                code += a[i][j] * b[j];
            } {
                code += a[i][j] * b[j];
            } code += a[i][j] * b[j] code a[i][j] * b[j] a[i][j] a[i] a i j b[j] b j if(code > 0){
                count++;
            } code > 0 code 0 {
                count++;
            } count++ count System.out.println(count) System.out.println 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 = Integer.parseInt(sc.next());
        int m = Integer.parseInt(sc.next());
        int c = Integer.parseInt(sc.next());
        int[] b = new int[m];
        for(int i = 0; i < m; i++){
            b[i] = Integer.parseInt(sc.next());
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = Integer.parseInt(sc.next());
            }
        }
        
        int count = 0;
        for(int i = 0; i < n; i++){
            int code = c;
            for(int j = 0; j < m; j++){
                code += a[i][j] * b[j];
            }
            if(code > 0){
                count++;
            }
        }
        
        System.out.println(count);
    }
} 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];
        for(int i = 0; i < m; i++){
            b[i] = Integer.parseInt(sc.next());
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = Integer.parseInt(sc.next());
            }
        }
        
        int count = 0;
        for(int i = 0; i < n; i++){
            int code = c;
            for(int j = 0; j < m; j++){
                code += a[i][j] * b[j];
            }
            if(code > 0){
                count++;
            }
        }
        
        System.out.println(count);
    }
} 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];
        for(int i = 0; i < m; i++){
            b[i] = Integer.parseInt(sc.next());
        }
        int[][] a = new int[n][m];
        for(int i = 0; i < n; i++){
            for(int j = 0; j < m; j++){
                a[i][j] = Integer.parseInt(sc.next());
            }
        }
        
        int count = 0;
        for(int i = 0; i < n; i++){
            int code = c;
            for(int j = 0; j < m; j++){
                code += a[i][j] * b[j];
            }
            if(code > 0){
                count++;
            }
        }
        
        System.out.println(count);
    }
}