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 < M; i++){
            B[i] = sc.nextInt();
        }

        int res = 0;
        for(int i = 0; i < N; i++){
            int tmp = 0;
            for(int j = 0; j < M; j++){
               int src = sc.nextInt();
               tmp += src * B[j];
            }
            if((tmp + C) > 0){
               res++;
            }
        }

        System.out.println(res);
    }

} 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 < M; i++){
            B[i] = sc.nextInt();
        }

        int res = 0;
        for(int i = 0; i < N; i++){
            int tmp = 0;
            for(int j = 0; j < M; j++){
               int src = sc.nextInt();
               tmp += src * B[j];
            }
            if((tmp + C) > 0){
               res++;
            }
        }

        System.out.println(res);
    }

} 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 < M; i++){
            B[i] = sc.nextInt();
        }

        int res = 0;
        for(int i = 0; i < N; i++){
            int tmp = 0;
            for(int j = 0; j < M; j++){
               int src = sc.nextInt();
               tmp += src * B[j];
            }
            if((tmp + C) > 0){
               res++;
            }
        }

        System.out.println(res);
    } 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 < M; i++){
            B[i] = sc.nextInt();
        }

        int res = 0;
        for(int i = 0; i < N; i++){
            int tmp = 0;
            for(int j = 0; j < M; j++){
               int src = sc.nextInt();
               tmp += src * B[j];
            }
            if((tmp + C) > 0){
               res++;
            }
        }

        System.out.println(res);
    } 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 res = 0; res 0 for(int i = 0; i < N; i++){
            int tmp = 0;
            for(int j = 0; j < M; j++){
               int src = sc.nextInt();
               tmp += src * B[j];
            }
            if((tmp + C) > 0){
               res++;
            }
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            int tmp = 0;
            for(int j = 0; j < M; j++){
               int src = sc.nextInt();
               tmp += src * B[j];
            }
            if((tmp + C) > 0){
               res++;
            }
        } {
            int tmp = 0;
            for(int j = 0; j < M; j++){
               int src = sc.nextInt();
               tmp += src * B[j];
            }
            if((tmp + C) > 0){
               res++;
            }
        } int tmp = 0; tmp 0 for(int j = 0; j < M; j++){
               int src = sc.nextInt();
               tmp += src * B[j];
            } int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
               int src = sc.nextInt();
               tmp += src * B[j];
            } {
               int src = sc.nextInt();
               tmp += src * B[j];
            } int src = sc.nextInt(); src sc.nextInt() sc.nextInt sc tmp += src * B[j] tmp src * B[j] src B[j] B j if((tmp + C) > 0){
               res++;
            } (tmp + C) > 0 (tmp + C) tmp C 0 {
               res++;
            } res++ res System.out.println(res) System.out.println System.out System System.out res 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 < M; i++){
            B[i] = sc.nextInt();
        }

        int res = 0;
        for(int i = 0; i < N; i++){
            int tmp = 0;
            for(int j = 0; j < M; j++){
               int src = sc.nextInt();
               tmp += src * B[j];
            }
            if((tmp + C) > 0){
               res++;
            }
        }

        System.out.println(res);
    }

} 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 < M; i++){
            B[i] = sc.nextInt();
        }

        int res = 0;
        for(int i = 0; i < N; i++){
            int tmp = 0;
            for(int j = 0; j < M; j++){
               int src = sc.nextInt();
               tmp += src * B[j];
            }
            if((tmp + C) > 0){
               res++;
            }
        }

        System.out.println(res);
    }

} 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 < M; i++){
            B[i] = sc.nextInt();
        }

        int res = 0;
        for(int i = 0; i < N; i++){
            int tmp = 0;
            for(int j = 0; j < M; j++){
               int src = sc.nextInt();
               tmp += src * B[j];
            }
            if((tmp + C) > 0){
               res++;
            }
        }

        System.out.println(res);
    }

}