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];
		int count = 0;

		for (int i = 0;i<m ;i++ ) {
			b[i] = sc.nextInt();
		}

		for (int i = 0;i<n ;i++ ) {
			int sum =0;
			for (int j = 0;j<m ;j++ ) {
				int	a = sc.nextInt();
				sum += b[j]*a;
			}

			if (sum+c>0) {
				count++;
			}
		}

		System.out.println(count);
	}
} 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];
		int count = 0;

		for (int i = 0;i<m ;i++ ) {
			b[i] = sc.nextInt();
		}

		for (int i = 0;i<n ;i++ ) {
			int sum =0;
			for (int j = 0;j<m ;j++ ) {
				int	a = sc.nextInt();
				sum += b[j]*a;
			}

			if (sum+c>0) {
				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];
		int count = 0;

		for (int i = 0;i<m ;i++ ) {
			b[i] = sc.nextInt();
		}

		for (int i = 0;i<n ;i++ ) {
			int sum =0;
			for (int j = 0;j<m ;j++ ) {
				int	a = sc.nextInt();
				sum += b[j]*a;
			}

			if (sum+c>0) {
				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];
		int count = 0;

		for (int i = 0;i<m ;i++ ) {
			b[i] = sc.nextInt();
		}

		for (int i = 0;i<n ;i++ ) {
			int sum =0;
			for (int j = 0;j<m ;j++ ) {
				int	a = sc.nextInt();
				sum += b[j]*a;
			}

			if (sum+c>0) {
				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 int count = 0; count 0 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 sum =0;
			for (int j = 0;j<m ;j++ ) {
				int	a = sc.nextInt();
				sum += b[j]*a;
			}

			if (sum+c>0) {
				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++ ) {
				int	a = sc.nextInt();
				sum += b[j]*a;
			}

			if (sum+c>0) {
				count++;
			}
		} {
			int sum =0;
			for (int j = 0;j<m ;j++ ) {
				int	a = sc.nextInt();
				sum += b[j]*a;
			}

			if (sum+c>0) {
				count++;
			}
		} int sum =0; sum 0 for (int j = 0;j<m ;j++ ) {
				int	a = sc.nextInt();
				sum += b[j]*a;
			} int j = 0; int j = 0; j 0 j<m j m j++ j++ j {
				int	a = sc.nextInt();
				sum += b[j]*a;
			} {
				int	a = sc.nextInt();
				sum += b[j]*a;
			} int	a = sc.nextInt(); a sc.nextInt() sc.nextInt sc sum += b[j]*a sum b[j]*a b[j] b j a if (sum+c>0) {
				count++;
			} sum+c>0 sum+c sum c 0 {
				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];
		int count = 0;

		for (int i = 0;i<m ;i++ ) {
			b[i] = sc.nextInt();
		}

		for (int i = 0;i<n ;i++ ) {
			int sum =0;
			for (int j = 0;j<m ;j++ ) {
				int	a = sc.nextInt();
				sum += b[j]*a;
			}

			if (sum+c>0) {
				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];
		int count = 0;

		for (int i = 0;i<m ;i++ ) {
			b[i] = sc.nextInt();
		}

		for (int i = 0;i<n ;i++ ) {
			int sum =0;
			for (int j = 0;j<m ;j++ ) {
				int	a = sc.nextInt();
				sum += b[j]*a;
			}

			if (sum+c>0) {
				count++;
			}
		}

		System.out.println(count);
	}
} 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];
		int count = 0;

		for (int i = 0;i<m ;i++ ) {
			b[i] = sc.nextInt();
		}

		for (int i = 0;i<n ;i++ ) {
			int sum =0;
			for (int j = 0;j<m ;j++ ) {
				int	a = sc.nextInt();
				sum += b[j]*a;
			}

			if (sum+c>0) {
				count++;
			}
		}

		System.out.println(count);
	}
}
