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