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[] arr = new int[m];
		for (int i = 0; i < m; i++) {
			arr[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < n; i++) {
			int total = c;
			for (int j = 0; j < m; j++) {
				total += sc.nextInt() * arr[j];
			}
			if (total > 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[] arr = new int[m];
		for (int i = 0; i < m; i++) {
			arr[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < n; i++) {
			int total = c;
			for (int j = 0; j < m; j++) {
				total += sc.nextInt() * arr[j];
			}
			if (total > 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[] arr = new int[m];
		for (int i = 0; i < m; i++) {
			arr[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < n; i++) {
			int total = c;
			for (int j = 0; j < m; j++) {
				total += sc.nextInt() * arr[j];
			}
			if (total > 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[] arr = new int[m];
		for (int i = 0; i < m; i++) {
			arr[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < n; i++) {
			int total = c;
			for (int j = 0; j < m; j++) {
				total += sc.nextInt() * arr[j];
			}
			if (total > 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[] arr = new int[m]; arr new int[m] m for (int i = 0; i < m; i++) {
			arr[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < m i m i++ i++ i {
			arr[i] = sc.nextInt();
		} {
			arr[i] = sc.nextInt();
		} arr[i] = sc.nextInt() arr[i] arr i sc.nextInt() sc.nextInt sc int count = 0; count 0 for (int i = 0; i < n; i++) {
			int total = c;
			for (int j = 0; j < m; j++) {
				total += sc.nextInt() * arr[j];
			}
			if (total > 0) {
				count++;
			}
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			int total = c;
			for (int j = 0; j < m; j++) {
				total += sc.nextInt() * arr[j];
			}
			if (total > 0) {
				count++;
			}
		} {
			int total = c;
			for (int j = 0; j < m; j++) {
				total += sc.nextInt() * arr[j];
			}
			if (total > 0) {
				count++;
			}
		} int total = c; total c for (int j = 0; j < m; j++) {
				total += sc.nextInt() * arr[j];
			} int j = 0; int j = 0; j 0 j < m j m j++ j++ j {
				total += sc.nextInt() * arr[j];
			} {
				total += sc.nextInt() * arr[j];
			} total += sc.nextInt() * arr[j] total sc.nextInt() * arr[j] sc.nextInt() sc.nextInt sc arr[j] arr j if (total > 0) {
				count++;
			} total > 0 total 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[] arr = new int[m];
		for (int i = 0; i < m; i++) {
			arr[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < n; i++) {
			int total = c;
			for (int j = 0; j < m; j++) {
				total += sc.nextInt() * arr[j];
			}
			if (total > 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[] arr = new int[m];
		for (int i = 0; i < m; i++) {
			arr[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < n; i++) {
			int total = c;
			for (int j = 0; j < m; j++) {
				total += sc.nextInt() * arr[j];
			}
			if (total > 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[] arr = new int[m];
		for (int i = 0; i < m; i++) {
			arr[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < n; i++) {
			int total = c;
			for (int j = 0; j < m; j++) {
				total += sc.nextInt() * arr[j];
			}
			if (total > 0) {
				count++;
			}
		}
		System.out.println(count);
	}
}
