import java.util.Scanner;

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[] Bi = new int[M];
        for (int i=0; i<M; i++) {
            Bi[i] = sc.nextInt();
        }
        int cnt = 0;
        for (int i=0; i<N; i++) {
            int cal = 0;
            for (int j=0; j<M; j++) {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            }
            if ((cal + C) > 0) {
                cnt++;
            }
        }
        System.out.println(cnt);
    }

} import java.util.Scanner; Scanner 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[] Bi = new int[M];
        for (int i=0; i<M; i++) {
            Bi[i] = sc.nextInt();
        }
        int cnt = 0;
        for (int i=0; i<N; i++) {
            int cal = 0;
            for (int j=0; j<M; j++) {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            }
            if ((cal + C) > 0) {
                cnt++;
            }
        }
        System.out.println(cnt);
    }

} 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[] Bi = new int[M];
        for (int i=0; i<M; i++) {
            Bi[i] = sc.nextInt();
        }
        int cnt = 0;
        for (int i=0; i<N; i++) {
            int cal = 0;
            for (int j=0; j<M; j++) {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            }
            if ((cal + C) > 0) {
                cnt++;
            }
        }
        System.out.println(cnt);
    } main {

        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();

        int[] Bi = new int[M];
        for (int i=0; i<M; i++) {
            Bi[i] = sc.nextInt();
        }
        int cnt = 0;
        for (int i=0; i<N; i++) {
            int cal = 0;
            for (int j=0; j<M; j++) {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            }
            if ((cal + C) > 0) {
                cnt++;
            }
        }
        System.out.println(cnt);
    } 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[] Bi = new int[M]; Bi new int[M] M for (int i=0; i<M; i++) {
            Bi[i] = sc.nextInt();
        } int i=0; int i=0; i 0 i<M i M i++ i++ i {
            Bi[i] = sc.nextInt();
        } {
            Bi[i] = sc.nextInt();
        } Bi[i] = sc.nextInt() Bi[i] Bi i sc.nextInt() sc.nextInt sc int cnt = 0; cnt 0 for (int i=0; i<N; i++) {
            int cal = 0;
            for (int j=0; j<M; j++) {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            }
            if ((cal + C) > 0) {
                cnt++;
            }
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
            int cal = 0;
            for (int j=0; j<M; j++) {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            }
            if ((cal + C) > 0) {
                cnt++;
            }
        } {
            int cal = 0;
            for (int j=0; j<M; j++) {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            }
            if ((cal + C) > 0) {
                cnt++;
            }
        } int cal = 0; cal 0 for (int j=0; j<M; j++) {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            } int j=0; int j=0; j 0 j<M j M j++ j++ j {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            } {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            } int A = sc.nextInt(); A sc.nextInt() sc.nextInt sc int B = Bi[j]; B Bi[j] Bi j cal = cal + (A * B) cal cal + (A * B) cal (A * B) A B if ((cal + C) > 0) {
                cnt++;
            } (cal + C) > 0 (cal + C) cal C 0 {
                cnt++;
            } cnt++ cnt System.out.println(cnt) System.out.println System.out System System.out cnt 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[] Bi = new int[M];
        for (int i=0; i<M; i++) {
            Bi[i] = sc.nextInt();
        }
        int cnt = 0;
        for (int i=0; i<N; i++) {
            int cal = 0;
            for (int j=0; j<M; j++) {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            }
            if ((cal + C) > 0) {
                cnt++;
            }
        }
        System.out.println(cnt);
    }

} 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[] Bi = new int[M];
        for (int i=0; i<M; i++) {
            Bi[i] = sc.nextInt();
        }
        int cnt = 0;
        for (int i=0; i<N; i++) {
            int cal = 0;
            for (int j=0; j<M; j++) {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            }
            if ((cal + C) > 0) {
                cnt++;
            }
        }
        System.out.println(cnt);
    }

} Main
import java.util.Scanner;

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[] Bi = new int[M];
        for (int i=0; i<M; i++) {
            Bi[i] = sc.nextInt();
        }
        int cnt = 0;
        for (int i=0; i<N; i++) {
            int cal = 0;
            for (int j=0; j<M; j++) {
                int A = sc.nextInt();
                int B = Bi[j];
                cal = cal + (A * B);
            }
            if ((cal + C) > 0) {
                cnt++;
            }
        }
        System.out.println(cnt);
    }

}
