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[] 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 cnt = 0;


        for (int i = 0; i < N; i++) {
            int sum = C;
            for (int j = 0; j < M; j++) {
                sum += A[i][j] * B[j];
            }
            if (sum > 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[] 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 cnt = 0;


        for (int i = 0; i < N; i++) {
            int sum = C;
            for (int j = 0; j < M; j++) {
                sum += A[i][j] * B[j];
            }
            if (sum > 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[] 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 cnt = 0;


        for (int i = 0; i < N; i++) {
            int sum = C;
            for (int j = 0; j < M; j++) {
                sum += A[i][j] * B[j];
            }
            if (sum > 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[] 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 cnt = 0;


        for (int i = 0; i < N; i++) {
            int sum = C;
            for (int j = 0; j < M; j++) {
                sum += A[i][j] * B[j];
            }
            if (sum > 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[] 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 cnt = 0; cnt 0 for (int i = 0; i < N; i++) {
            int sum = C;
            for (int j = 0; j < M; j++) {
                sum += A[i][j] * B[j];
            }
            if (sum > 0) {
                cnt++;
            }
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            int sum = C;
            for (int j = 0; j < M; j++) {
                sum += A[i][j] * B[j];
            }
            if (sum > 0) {
                cnt++;
            }
        } {
            int sum = C;
            for (int j = 0; j < M; j++) {
                sum += A[i][j] * B[j];
            }
            if (sum > 0) {
                cnt++;
            }
        } int sum = C; sum C for (int j = 0; j < M; j++) {
                sum += A[i][j] * B[j];
            } int j = 0; int j = 0; j 0 j < M j M 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) {
                cnt++;
            } sum > 0 sum 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[] 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 cnt = 0;


        for (int i = 0; i < N; i++) {
            int sum = C;
            for (int j = 0; j < M; j++) {
                sum += A[i][j] * B[j];
            }
            if (sum > 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[] 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 cnt = 0;


        for (int i = 0; i < N; i++) {
            int sum = C;
            for (int j = 0; j < M; j++) {
                sum += A[i][j] * B[j];
            }
            if (sum > 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[] 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 cnt = 0;


        for (int i = 0; i < N; i++) {
            int sum = C;
            for (int j = 0; j < M; j++) {
                sum += A[i][j] * B[j];
            }
            if (sum > 0) {
                cnt++;
            }
        }

        System.out.println(cnt);

    }
}
