import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        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 count = 0;
        for (int i = 0 ; i < n ; i++) {
            int sum = 0;
            for (int j = 0 ; j < m ; j++) {
                sum += b[j] * a[i][j];
            }
            if (sum + c > 0) count++;
        }
        System.out.println(count);
    }

} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        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 count = 0;
        for (int i = 0 ; i < n ; i++) {
            int sum = 0;
            for (int j = 0 ; j < m ; j++) {
                sum += b[j] * a[i][j];
            }
            if (sum + c > 0) count++;
        }
        System.out.println(count);
    }

} Main public static void main(String[] args) {
        @SuppressWarnings("resource")
        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 count = 0;
        for (int i = 0 ; i < n ; i++) {
            int sum = 0;
            for (int j = 0 ; j < m ; j++) {
                sum += b[j] * a[i][j];
            }
            if (sum + c > 0) count++;
        }
        System.out.println(count);
    } main {
        @SuppressWarnings("resource")
        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 count = 0;
        for (int i = 0 ; i < n ; i++) {
            int sum = 0;
            for (int j = 0 ; j < m ; j++) {
                sum += b[j] * a[i][j];
            }
            if (sum + c > 0) count++;
        }
        System.out.println(count);
    } @SuppressWarnings("resource")
        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 count = 0; count 0 for (int i = 0 ; i < n ; i++) {
            int sum = 0;
            for (int j = 0 ; j < m ; j++) {
                sum += b[j] * a[i][j];
            }
            if (sum + c > 0) count++;
        } int i = 0 ; int i = 0 ; i 0 i < n i n i++ i++ i {
            int sum = 0;
            for (int j = 0 ; j < m ; j++) {
                sum += b[j] * a[i][j];
            }
            if (sum + c > 0) count++;
        } {
            int sum = 0;
            for (int j = 0 ; j < m ; j++) {
                sum += b[j] * a[i][j];
            }
            if (sum + c > 0) count++;
        } int sum = 0; sum 0 for (int j = 0 ; j < m ; j++) {
                sum += b[j] * a[i][j];
            } int j = 0 ; int j = 0 ; j 0 j < m j m j++ j++ j {
                sum += b[j] * a[i][j];
            } {
                sum += b[j] * a[i][j];
            } sum += b[j] * a[i][j] sum b[j] * a[i][j] b[j] b j a[i][j] a[i] a i j if (sum + c > 0) count++; sum + c > 0 sum + c sum c 0 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) {
        @SuppressWarnings("resource")
        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 count = 0;
        for (int i = 0 ; i < n ; i++) {
            int sum = 0;
            for (int j = 0 ; j < m ; j++) {
                sum += b[j] * a[i][j];
            }
            if (sum + c > 0) count++;
        }
        System.out.println(count);
    }

} public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        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 count = 0;
        for (int i = 0 ; i < n ; i++) {
            int sum = 0;
            for (int j = 0 ; j < m ; j++) {
                sum += b[j] * a[i][j];
            }
            if (sum + c > 0) count++;
        }
        System.out.println(count);
    }

} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        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 count = 0;
        for (int i = 0 ; i < n ; i++) {
            int sum = 0;
            for (int j = 0 ; j < m ; j++) {
                sum += b[j] * a[i][j];
            }
            if (sum + c > 0) count++;
        }
        System.out.println(count);
    }

}