import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		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 ans = 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 + c > 0) {
				ans++;
			}
		}
		sc.close();

		System.out.println(ans);
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) throws Exception {
		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 ans = 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 + c > 0) {
				ans++;
			}
		}
		sc.close();

		System.out.println(ans);
	}
} Main public static void main(String[] args) throws Exception {
		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 ans = 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 + c > 0) {
				ans++;
			}
		}
		sc.close();

		System.out.println(ans);
	} 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 ans = 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 + c > 0) {
				ans++;
			}
		}
		sc.close();

		System.out.println(ans);
	} 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 ans = 0; ans 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 + c > 0) {
				ans++;
			}
		} 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 + c > 0) {
				ans++;
			}
		} {
			int sum = 0;
			for (int j = 0; j < m; j++) {
				sum += b[j] * sc.nextInt();
			}
			if (sum + c > 0) {
				ans++;
			}
		} 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 + c > 0) {
				ans++;
			} sum + c > 0 sum + c sum c 0 {
				ans++;
			} ans++ ans sc.close() sc.close sc System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
	public static void main(String[] args) throws Exception {
		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 ans = 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 + c > 0) {
				ans++;
			}
		}
		sc.close();

		System.out.println(ans);
	}
} public class Main {
	public static void main(String[] args) throws Exception {
		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 ans = 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 + c > 0) {
				ans++;
			}
		}
		sc.close();

		System.out.println(ans);
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		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 ans = 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 + c > 0) {
				ans++;
			}
		}
		sc.close();

		System.out.println(ans);
	}
}
