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 j = 0; j < M; j++) {
			B[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] * sc.nextInt();
			}
			if (sum > -1 * C) {
				count++;
			}
		}

		System.out.println(count);

	}

}
 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 j = 0; j < M; j++) {
			B[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] * sc.nextInt();
			}
			if (sum > -1 * C) {
				count++;
			}
		}

		System.out.println(count);

	}

} 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 j = 0; j < M; j++) {
			B[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] * sc.nextInt();
			}
			if (sum > -1 * C) {
				count++;
			}
		}

		System.out.println(count);

	} 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 j = 0; j < M; j++) {
			B[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] * sc.nextInt();
			}
			if (sum > -1 * C) {
				count++;
			}
		}

		System.out.println(count);

	} 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 j = 0; j < M; j++) {
			B[j] = sc.nextInt();
		} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
			B[j] = sc.nextInt();
		} {
			B[j] = sc.nextInt();
		} B[j] = sc.nextInt() B[j] B 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] * sc.nextInt();
			}
			if (sum > -1 * C) {
				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] * sc.nextInt();
			}
			if (sum > -1 * C) {
				count++;
			}
		} {
			int sum = 0;
			for(int j = 0; j < M; j++) {
				sum += B[j] * sc.nextInt();
			}
			if (sum > -1 * C) {
				count++;
			}
		} int sum = 0; sum 0 for(int j = 0; j < M; j++) {
				sum += B[j] * sc.nextInt();
			} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
				sum += B[j] * sc.nextInt();
			} {
				sum += B[j] * sc.nextInt();
			} sum += B[j] * sc.nextInt() sum B[j] * sc.nextInt() B[j] B j sc.nextInt() sc.nextInt sc if (sum > -1 * C) {
				count++;
			} sum > -1 * C sum -1 * C -1 1 C {
				count++;
			} 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) {

		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 j = 0; j < M; j++) {
			B[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] * sc.nextInt();
			}
			if (sum > -1 * C) {
				count++;
			}
		}

		System.out.println(count);

	}

} 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 j = 0; j < M; j++) {
			B[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] * sc.nextInt();
			}
			if (sum > -1 * C) {
				count++;
			}
		}

		System.out.println(count);

	}

} 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 j = 0; j < M; j++) {
			B[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] * sc.nextInt();
			}
			if (sum > -1 * C) {
				count++;
			}
		}

		System.out.println(count);

	}

}

