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 A[] = new int[M];
		int cnt = 0;

		int[] B = new int[M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			int det = 0;
			for (int j = 0; j < M; j++) {
				det += B[j] * sc.nextInt();
			}
			det += C;

			if (det > 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 A[] = new int[M];
		int cnt = 0;

		int[] B = new int[M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			int det = 0;
			for (int j = 0; j < M; j++) {
				det += B[j] * sc.nextInt();
			}
			det += C;

			if (det > 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 A[] = new int[M];
		int cnt = 0;

		int[] B = new int[M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			int det = 0;
			for (int j = 0; j < M; j++) {
				det += B[j] * sc.nextInt();
			}
			det += C;

			if (det > 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 A[] = new int[M];
		int cnt = 0;

		int[] B = new int[M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			int det = 0;
			for (int j = 0; j < M; j++) {
				det += B[j] * sc.nextInt();
			}
			det += C;

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

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

			if (det > 0) {
				cnt++;
			}
		} {
			int det = 0;
			for (int j = 0; j < M; j++) {
				det += B[j] * sc.nextInt();
			}
			det += C;

			if (det > 0) {
				cnt++;
			}
		} int det = 0; det 0 for (int j = 0; j < M; j++) {
				det += B[j] * sc.nextInt();
			} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
				det += B[j] * sc.nextInt();
			} {
				det += B[j] * sc.nextInt();
			} det += B[j] * sc.nextInt() det B[j] * sc.nextInt() B[j] B j sc.nextInt() sc.nextInt sc det += C det C if (det > 0) {
				cnt++;
			} det > 0 det 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 A[] = new int[M];
		int cnt = 0;

		int[] B = new int[M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			int det = 0;
			for (int j = 0; j < M; j++) {
				det += B[j] * sc.nextInt();
			}
			det += C;

			if (det > 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 A[] = new int[M];
		int cnt = 0;

		int[] B = new int[M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			int det = 0;
			for (int j = 0; j < M; j++) {
				det += B[j] * sc.nextInt();
			}
			det += C;

			if (det > 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 A[] = new int[M];
		int cnt = 0;

		int[] B = new int[M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			int det = 0;
			for (int j = 0; j < M; j++) {
				det += B[j] * sc.nextInt();
			}
			det += C;

			if (det > 0) {
				cnt++;
			}
		}

		System.out.println(cnt);

	}
}